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<?php |
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namespace dokuwiki\Parsing\Handler; |
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/** |
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* Handler for paragraphs |
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* |
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* @author Harry Fuecks <[email protected]> |
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*/ |
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class Block |
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{ |
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protected $calls = array(); |
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protected $skipEol = false; |
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protected $inParagraph = false; |
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// Blocks these should not be inside paragraphs |
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protected $blockOpen = array( |
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'header', |
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'listu_open','listo_open','listitem_open','listcontent_open', |
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'table_open','tablerow_open','tablecell_open','tableheader_open','tablethead_open', |
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'quote_open', |
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'code','file','hr','preformatted','rss', |
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'htmlblock','phpblock', |
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'footnote_open', |
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); |
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protected $blockClose = array( |
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'header', |
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'listu_close','listo_close','listitem_close','listcontent_close', |
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'table_close','tablerow_close','tablecell_close','tableheader_close','tablethead_close', |
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'quote_close', |
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'code','file','hr','preformatted','rss', |
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'htmlblock','phpblock', |
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'footnote_close', |
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); |
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// Stacks can contain paragraphs |
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protected $stackOpen = array( |
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'section_open', |
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); |
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protected $stackClose = array( |
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'section_close', |
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); |
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/** |
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* Constructor. Adds loaded syntax plugins to the block and stack |
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* arrays |
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* |
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* @author Andreas Gohr <[email protected]> |
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*/ |
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public function __construct() |
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{ |
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global $DOKU_PLUGINS; |
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//check if syntax plugins were loaded |
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if (empty($DOKU_PLUGINS['syntax'])) return; |
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foreach ($DOKU_PLUGINS['syntax'] as $n => $p) { |
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$ptype = $p->getPType(); |
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if ($ptype == 'block') { |
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$this->blockOpen[] = 'plugin_'.$n; |
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$this->blockClose[] = 'plugin_'.$n; |
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} elseif ($ptype == 'stack') { |
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$this->stackOpen[] = 'plugin_'.$n; |
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$this->stackClose[] = 'plugin_'.$n; |
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} |
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} |
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} |
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protected function openParagraph($pos) |
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{ |
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if ($this->inParagraph) return; |
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$this->calls[] = array('p_open',array(), $pos); |
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$this->inParagraph = true; |
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$this->skipEol = true; |
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} |
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/** |
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* Close a paragraph if needed |
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* |
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* This function makes sure there are no empty paragraphs on the stack |
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* |
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* @author Andreas Gohr <[email protected]> |
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* |
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* @param string|integer $pos |
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*/ |
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protected function closeParagraph($pos) |
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{ |
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if (!$this->inParagraph) return; |
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// look back if there was any content - we don't want empty paragraphs |
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$content = ''; |
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$ccount = count($this->calls); |
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for ($i=$ccount-1; $i>=0; $i--) { |
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if ($this->calls[$i][0] == 'p_open') { |
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break; |
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} elseif ($this->calls[$i][0] == 'cdata') { |
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$content .= $this->calls[$i][1][0]; |
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} else { |
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$content = 'found markup'; |
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break; |
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} |
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} |
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if (trim($content)=='') { |
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//remove the whole paragraph |
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//array_splice($this->calls,$i); // <- this is much slower than the loop below |
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for ($x=$ccount; $x>$i; |
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$x--) array_pop($this->calls); |
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} else { |
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// remove ending linebreaks in the paragraph |
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$i=count($this->calls)-1; |
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if ($this->calls[$i][0] == 'cdata') $this->calls[$i][1][0] = rtrim($this->calls[$i][1][0], "\n"); |
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$this->calls[] = array('p_close',array(), $pos); |
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} |
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$this->inParagraph = false; |
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$this->skipEol = true; |
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} |
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protected function addCall($call) |
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{ |
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$key = count($this->calls); |
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if ($key and ($call[0] == 'cdata') and ($this->calls[$key-1][0] == 'cdata')) { |
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$this->calls[$key-1][1][0] .= $call[1][0]; |
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} else { |
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$this->calls[] = $call; |
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} |
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} |
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// simple version of addCall, without checking cdata |
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protected function storeCall($call) |
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{ |
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$this->calls[] = $call; |
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} |
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/** |
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* Processes the whole instruction stack to open and close paragraphs |
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* |
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* @author Harry Fuecks <[email protected]> |
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* @author Andreas Gohr <[email protected]> |
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* |
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* @param array $calls |
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* |
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* @return array |
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*/ |
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public function process($calls) |
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{ |
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// open first paragraph |
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$this->openParagraph(0); |
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foreach ($calls as $key => $call) { |
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$cname = $call[0]; |
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if ($cname == 'plugin') { |
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$cname='plugin_'.$call[1][0]; |
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$plugin = true; |
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$plugin_open = (($call[1][2] == DOKU_LEXER_ENTER) || ($call[1][2] == DOKU_LEXER_SPECIAL)); |
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$plugin_close = (($call[1][2] == DOKU_LEXER_EXIT) || ($call[1][2] == DOKU_LEXER_SPECIAL)); |
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} else { |
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$plugin = false; |
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} |
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/* stack */ |
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if (in_array($cname, $this->stackClose) && (!$plugin || $plugin_close)) { |
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$this->closeParagraph($call[2]); |
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$this->storeCall($call); |
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$this->openParagraph($call[2]); |
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continue; |
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} |
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if (in_array($cname, $this->stackOpen) && (!$plugin || $plugin_open)) { |
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$this->closeParagraph($call[2]); |
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$this->storeCall($call); |
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$this->openParagraph($call[2]); |
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continue; |
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} |
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/* block */ |
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// If it's a substition it opens and closes at the same call. |
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// To make sure next paragraph is correctly started, let close go first. |
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if (in_array($cname, $this->blockClose) && (!$plugin || $plugin_close)) { |
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$this->closeParagraph($call[2]); |
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$this->storeCall($call); |
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$this->openParagraph($call[2]); |
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continue; |
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} |
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if (in_array($cname, $this->blockOpen) && (!$plugin || $plugin_open)) { |
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$this->closeParagraph($call[2]); |
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$this->storeCall($call); |
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continue; |
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} |
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/* eol */ |
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if ($cname == 'eol') { |
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// Check this isn't an eol instruction to skip... |
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if (!$this->skipEol) { |
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// Next is EOL => double eol => mark as paragraph |
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if (isset($calls[$key+1]) && $calls[$key+1][0] == 'eol') { |
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$this->closeParagraph($call[2]); |
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$this->openParagraph($call[2]); |
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} else { |
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//if this is just a single eol make a space from it |
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$this->addCall(array('cdata',array("\n"), $call[2])); |
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} |
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} |
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continue; |
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} |
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/* normal */ |
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$this->addCall($call); |
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$this->skipEol = false; |
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} |
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// close last paragraph |
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$call = end($this->calls); |
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$this->closeParagraph($call[2]); |
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return $this->calls; |
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} |
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} |
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If you define a variable conditionally, it can happen that it is not defined for all execution paths.
Let’s take a look at an example:
In the above example, the variable $x is defined if you pass “foo” or “bar” as argument for $a. However, since the switch statement has no default case statement, if you pass any other value, the variable $x would be undefined.
Available Fixes
Check for existence of the variable explicitly:
Define a default value for the variable:
Add a value for the missing path: