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<?php |
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namespace Roesch; |
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/** |
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* Format HTML class |
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*/ |
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class Format |
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{ |
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/* |
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* @var |
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*/ |
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private $input = null; |
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/* |
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* @var |
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*/ |
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private $output = null; |
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/* |
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* @var |
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*/ |
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private $in_tag = false; |
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/* |
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* @var |
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*/ |
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private $in_comment = false; |
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/* |
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* @var |
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*/ |
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private $in_content = false; |
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/* |
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* @var |
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*/ |
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private $inline_tag = false; |
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/* |
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* @var |
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*/ |
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private $i = 0; |
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/* |
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* @var |
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*/ |
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private $indent_depth = 0; |
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/* |
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* @var |
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*/ |
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private $indent_type = "\t"; |
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/** |
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* Static interface |
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* - Allows you to call the method witout initialising the class first |
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* |
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* <code> |
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* // use spaces at 4 length |
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* echo \Roesch\Format::HTML('Unformatted HTML string'); |
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* |
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* // use spaces at 2 length |
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* echo \Roesch\Format::HTML('Unformatted HTML string', true, 2); |
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* |
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* // use tabs |
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* echo \Roesch\Format::HTML('Unformatted HTML string', false); |
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* </code> |
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* |
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* @param string $input HTML which is to be processed |
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* @param bool $use_spaces Use spaces instead of tabs |
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* @param int $indent_length Length of indent spacing |
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* @return string |
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*/ |
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public static function HTML($input, $use_spaces = true, $indent_length = 4) |
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{ |
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return (new self)->process($input, $use_spaces, $indent_length); |
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} |
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/** |
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* Process/Format HTML |
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* |
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* <code> |
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* $format = new \Roesch\Format(); |
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* |
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* // use spaces at 4 length |
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* echo $format->html('Unformatted HTML string'); |
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* |
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* // use spaces at 2 length |
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* echo $format->html('Unformatted HTML string', true, 2); |
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* |
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* // use tabs |
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* echo $format->html('Unformatted HTML string', false); |
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* </code> |
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* |
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* @param string $input HTML which is to be processed |
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* @param bool $use_spaces Use spaces instead of tabs |
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* @param int $indent_length Length of indent spacing |
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* @return string |
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*/ |
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private function process($input, $use_spaces = true, $indent_length = 4) |
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{ |
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if (!is_string($input)) { |
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throw new \InvalidArgumentException('1st argument must be a string'); |
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} |
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if (!is_int($indent_length)) { |
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throw new \InvalidArgumentException('3rd argument must be an integer'); |
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} |
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if ($indent_length < 0) { |
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throw new \InvalidArgumentException('3rd argument must be greater or equals 0'); |
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} |
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7 |
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if ($use_spaces) { |
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$this->indent_type = str_repeat(' ', $indent_length); |
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} |
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7 |
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$this->input = $input; |
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7 |
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$this->output = null; |
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7 |
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$i = 0; |
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if (preg_match('/<\!doctype/i', $this->input)) { |
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2 |
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$i = strpos($this->input, '>') + 1; |
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$this->output .= substr($this->input, 0, $i); |
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} |
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7 |
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for ($this->i = $i; $this->i < strlen($this->input); $this->i++) { |
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if ($this->in_comment) { |
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1 |
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$this->parse_comment(); |
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} elseif ($this->in_tag) { |
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$this->parse_inner_tag(); |
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} elseif ($this->inline_tag) { |
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$this->parse_inner_inline_tag(); |
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} else { |
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if (preg_match('/[\r\n\t]/', $this->input[$this->i])) { |
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continue; |
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} elseif ($this->input[$this->i] == '<') { |
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if (!$this->is_inline_tag()) { |
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$this->in_content = false; |
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} |
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$this->parse_tag(); |
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2 |
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} elseif (!$this->in_content) { |
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2 |
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if (!$this->inline_tag) { |
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$this->output .= "\n" . str_repeat($this->indent_type, $this->indent_depth); |
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} |
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2 |
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$this->in_content = true; |
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} |
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$this->output .= $this->input[$this->i]; |
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} |
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} |
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return trim(preg_replace("/(^[\r\n]*|[\r\n]+)[\s\t]*[\r\n]+/", "\n", $this->output)); |
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} |
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/** |
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* @return void |
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*/ |
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1 |
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private function parse_comment() |
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{ |
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1 |
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if ($this->is_end_comment()) { |
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1 |
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$this->in_comment = false; |
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1 |
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$this->output .= '-->'; |
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1 |
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$this->i += 3; |
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} else { |
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1 |
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$this->output .= $this->input[$this->i]; |
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} |
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1 |
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} |
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/** |
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* @return void |
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*/ |
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6 |
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private function parse_inner_tag() |
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{ |
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6 |
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if ($this->input[$this->i] == '>') { |
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$this->in_tag = false; |
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$this->output .= '>'; |
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} else { |
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$this->output .= $this->input[$this->i]; |
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} |
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} |
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/** |
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* @return void |
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*/ |
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3 |
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private function parse_inner_inline_tag() |
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{ |
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3 |
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if ($this->input[$this->i] == '>') { |
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3 |
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$this->inline_tag = false; |
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3 |
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$this->decrement_tabs(); |
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3 |
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$this->output .= '>'; |
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} else { |
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3 |
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$this->output .= $this->input[$this->i]; |
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} |
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3 |
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} |
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/** |
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* @return void |
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*/ |
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7 |
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private function parse_tag() |
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{ |
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7 |
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if ($this->is_comment()) { |
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1 |
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$this->output .= "\n" . str_repeat($this->indent_type, $this->indent_depth); |
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1 |
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$this->in_comment = true; |
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6 |
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} elseif ($this->is_end_tag()) { |
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4 |
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$this->in_tag = true; |
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4 |
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$this->inline_tag = false; |
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4 |
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$this->decrement_tabs(); |
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4 |
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if (!$this->is_inline_tag() && !$this->is_tag_empty()) { |
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4 |
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$this->output .= "\n" . str_repeat($this->indent_type, $this->indent_depth); |
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} |
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} else { |
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6 |
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$this->in_tag = true; |
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6 |
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if (!$this->in_content && !$this->inline_tag) { |
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6 |
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$this->output .= "\n" . str_repeat($this->indent_type, $this->indent_depth); |
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} |
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6 |
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if (!$this->is_closed_tag()) { |
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6 |
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$this->indent_depth++; |
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} |
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6 |
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if ($this->is_inline_tag()) { |
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3 |
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$this->inline_tag = true; |
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} |
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} |
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7 |
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} |
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/** |
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* @return bool |
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*/ |
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6 |
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private function is_end_tag() |
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{ |
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6 |
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for ($i = $this->i; $i < strlen($this->input); $i++) { |
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6 |
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if ($this->input[$i] == '<' && $this->input[$i + 1] == '/') { |
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return true; |
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6 |
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} elseif ($this->input[$i] == '<' && $this->input[$i + 1] == '!') { |
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1 |
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return true; |
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6 |
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} elseif ($this->input[$i] == '>') { |
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return false; |
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} |
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} |
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// @codeCoverageIgnoreStart |
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return false; |
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// @codeCoverageIgnoreEnd |
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} |
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/** |
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* @return void |
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*/ |
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6 |
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private function decrement_tabs() |
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{ |
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6 |
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$this->indent_depth--; |
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6 |
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if ($this->indent_depth < 0) { |
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// @codeCoverageIgnoreStart |
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$this->indent_depth = 0; |
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// @codeCoverageIgnoreEnd |
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} |
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6 |
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} |
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/** |
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* @return bool |
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*/ |
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7 |
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private function is_comment() |
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{ |
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if ( |
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7 |
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$this->input[$this->i] == '<' && |
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7 |
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$this->input[$this->i + 1] == '!' && |
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7 |
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$this->input[$this->i + 2] == '-' && |
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7 |
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$this->input[$this->i + 3] == '-' |
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) { |
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1 |
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return true; |
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} else { |
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6 |
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return false; |
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} |
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} |
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/** |
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* @return bool |
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*/ |
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1 |
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private function is_end_comment() |
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{ |
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280
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if ( |
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1 |
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$this->input[$this->i] == '-' && |
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1 |
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$this->input[$this->i + 1] == '-' && |
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1 |
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$this->input[$this->i + 2] == '>' |
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) { |
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285
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1 |
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return true; |
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286
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} else { |
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287
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1 |
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return false; |
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288
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} |
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289
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} |
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290
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291
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/** |
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292
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* @return bool |
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293
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*/ |
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294
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4 |
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private function is_tag_empty() |
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295
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{ |
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296
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4 |
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$tag = $this->get_current_tag($this->i + 2); |
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297
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4 |
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$in_tag = false; |
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298
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299
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4 |
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for ($i = $this->i - 1; $i >= 0; $i--) { |
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300
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4 |
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if (!$in_tag) { |
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301
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4 |
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if ($this->input[$i] == '>') { |
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302
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4 |
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$in_tag = true; |
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303
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2 |
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} elseif (!preg_match('/\s/', $this->input[$i])) { |
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304
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4 |
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return false; |
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305
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} |
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306
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} else { |
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307
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4 |
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if ($this->input[$i] == '<') { |
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308
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4 |
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if ($tag == $this->get_current_tag($i + 1)) { |
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309
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3 |
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return true; |
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310
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} else { |
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311
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3 |
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return false; |
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312
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} |
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313
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} |
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314
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} |
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315
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} |
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316
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// @codeCoverageIgnoreStart |
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317
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return true; |
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318
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// @codeCoverageIgnoreEnd |
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319
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} |
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320
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|
321
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/** |
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322
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* @param int $i String index of input |
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323
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* @return string |
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324
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*/ |
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325
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4 |
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private function get_current_tag($i) |
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326
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{ |
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327
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4 |
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$tag = ''; |
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328
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329
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4 |
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for ($i; $i < strlen($this->input); $i++) { |
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330
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4 |
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if ($this->input[$i] == '<') { |
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331
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// @codeCoverageIgnoreStart |
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332
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continue; |
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333
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// @codeCoverageIgnoreEnd |
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334
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4 |
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} elseif ($this->input[$i] == '>' or preg_match('/\s/', $this->input[$i])) { |
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335
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4 |
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return $tag; |
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336
|
|
|
} else { |
|
337
|
4 |
|
$tag .= $this->input[$i]; |
|
338
|
|
|
} |
|
339
|
|
|
} |
|
340
|
|
|
|
|
341
|
|
|
// @codeCoverageIgnoreStart |
|
342
|
|
|
return $tag; |
|
343
|
|
|
// @codeCoverageIgnoreEnd |
|
344
|
|
|
} |
|
345
|
|
|
|
|
346
|
|
|
/** |
|
347
|
|
|
* @return bool |
|
348
|
|
|
*/ |
|
349
|
6 |
|
private function is_closed_tag() |
|
350
|
|
|
{ |
|
351
|
|
|
$tags = array( |
|
352
|
6 |
|
'meta', 'link', 'img', 'hr', 'br', 'input', |
|
353
|
|
|
); |
|
354
|
|
|
|
|
355
|
6 |
|
$tag = ''; |
|
356
|
|
|
|
|
357
|
6 |
|
for ($i = $this->i; $i < strlen($this->input); $i++) { |
|
358
|
6 |
|
if ($this->input[$i] == '<') { |
|
359
|
6 |
|
continue; |
|
360
|
6 |
|
} elseif (preg_match('/\s/', $this->input[$i])) { |
|
361
|
5 |
|
break; |
|
362
|
|
|
} else { |
|
363
|
6 |
|
$tag .= $this->input[$i]; |
|
364
|
|
|
} |
|
365
|
|
|
} |
|
366
|
|
|
|
|
367
|
6 |
|
if (in_array($tag, $tags)) { |
|
368
|
2 |
|
return true; |
|
369
|
|
|
} else { |
|
370
|
6 |
|
return false; |
|
371
|
|
|
} |
|
372
|
|
|
} |
|
373
|
|
|
|
|
374
|
|
|
/** |
|
375
|
|
|
* @return bool |
|
376
|
|
|
*/ |
|
377
|
7 |
|
private function is_inline_tag() |
|
378
|
|
|
{ |
|
379
|
|
|
$tags = array( |
|
380
|
7 |
|
'title', |
|
381
|
|
|
'span', |
|
382
|
|
|
'abbr', |
|
383
|
|
|
'acronym', |
|
384
|
|
|
'b', |
|
385
|
|
|
'basefont', |
|
386
|
|
|
'bdo', |
|
387
|
|
|
'big', |
|
388
|
|
|
'cite', |
|
389
|
|
|
'code', |
|
390
|
|
|
'dfn', |
|
391
|
|
|
'em', |
|
392
|
|
|
'font', |
|
393
|
|
|
'i', |
|
394
|
|
|
'kbd', |
|
395
|
|
|
'q', |
|
396
|
|
|
's', |
|
397
|
|
|
'samp', |
|
398
|
|
|
'small', |
|
399
|
|
|
'strike', |
|
400
|
|
|
//'strong', |
|
401
|
|
|
'sub', |
|
402
|
|
|
'sup', |
|
403
|
|
|
'textarea', |
|
404
|
|
|
'tt', |
|
405
|
|
|
'u', |
|
406
|
|
|
'var', |
|
407
|
|
|
'del', |
|
408
|
|
|
'pre', |
|
409
|
|
|
); |
|
410
|
|
|
|
|
411
|
7 |
|
$tag = ''; |
|
412
|
|
|
|
|
413
|
7 |
|
for ($i = $this->i; $i < strlen($this->input); $i++) { |
|
414
|
7 |
|
if ($this->input[$i] == '<' or $this->input[$i] == '/') { |
|
|
|
|
|
|
415
|
7 |
|
continue; |
|
416
|
7 |
|
} elseif (preg_match('/\s/', $this->input[$i]) or $this->input[$i] == '>') { |
|
|
|
|
|
|
417
|
7 |
|
break; |
|
418
|
|
|
} else { |
|
419
|
7 |
|
$tag .= $this->input[$i]; |
|
420
|
|
|
} |
|
421
|
|
|
} |
|
422
|
|
|
|
|
423
|
7 |
|
if (in_array($tag, $tags)) { |
|
424
|
3 |
|
return true; |
|
425
|
|
|
} else { |
|
426
|
5 |
|
return false; |
|
427
|
|
|
} |
|
428
|
|
|
} |
|
429
|
|
|
} |
|
430
|
|
|
|
lcherone /
html-format
Loading history...
PHP has two types of connecting operators (logical operators, and boolean operators):
and&&or||The difference between these is the order in which they are executed. In most cases, you would want to use a boolean operator like
&&, or||.Let’s take a look at a few examples:
Logical Operators are used for Control-Flow
One case where you explicitly want to use logical operators is for control-flow such as this:
Since
dieintroduces problems of its own, f.e. it makes our code hardly testable, and prevents any kind of more sophisticated error handling; you probably do not want to use this in real-world code. Unfortunately, logical operators cannot be combined withthrowat this point:These limitations lead to logical operators rarely being of use in current PHP code.