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<?php |
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namespace Core\Traits; |
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use Core\Constant; |
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use Twig\Error\Error; |
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/** |
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* a trait with some string related helpers |
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* Trait StringFunctions |
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* @package Core\Traits |
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*/ |
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trait StringFunctions |
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{ |
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/** |
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* does a haystack start with a needle ? |
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* @param $haystack string the string to search in |
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* @param $needle string the string to search for |
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* @return bool |
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*/ |
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public function startsWith(string $haystack, string $needle): bool |
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{ |
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$length = strlen($needle); |
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return (substr($haystack, 0, $length) === $needle); |
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} |
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/** |
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* Does a haystack end with a needle |
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* @param $haystack string the string to search in |
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* @param $needle string the string to search for |
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* @return bool |
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*/ |
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public function endsWith(string $haystack, string $needle): bool |
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{ |
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$length = strlen($needle); |
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if ($length == 0) { |
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return true; |
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} |
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return (substr($haystack, -$length) === $needle); |
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} |
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/** |
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* Remove the tail of a string |
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* @param $string string to slice apart |
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* @param $tail string the string to remove |
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* @return string |
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*/ |
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public function removeFromEnd(string $string, string $tail): string |
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{ |
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if ($this->endsWith($string, $tail)) { |
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$string = substr($string, 0, -strlen($tail)); |
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} |
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return $string; |
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} |
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/** |
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* remove some characters from the front of the string |
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* @param string $string the string to be decapitated |
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* @param string $head the head to be cut off ("OFF WITH HIS HEAD") |
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* @return string |
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*/ |
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public function removeFromBeginning(string $string, string $head): string |
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{ |
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if ($this->startsWith($string, $head)) { |
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$string = substr($string, strlen($head)); |
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} |
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return $string; |
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} |
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public function getExcerpt($text, $count=Constant::EXCERPT_WORD_COUNT){ |
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if($count < 1){ |
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throw new \ErrorException('excerpt length too low'); |
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} |
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$text = str_replace(" ", " ", $text); |
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$string = explode(" ", $text); |
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$trimed = ''; |
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for ( $wordCounter = 0; $wordCounter < $count; $wordCounter++ ){ |
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$trimed .= $string[$wordCounter]; |
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if ( $wordCounter < $count-1 ){ $trimed .= " "; } |
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else { $trimed .= "..."; } |
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} |
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$trimed = trim($trimed); |
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return $trimed; |
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} |
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} |
Starbugstone /
blogoc
