60 lines
1.5 KiB
PHP
Executable File
60 lines
1.5 KiB
PHP
Executable File
<?php
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class HTMLText extends Text {
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/**
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* Create a summary of the content. This will either be the first paragraph, or the first $maxWords
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* words, whichever is shorter
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*/
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public function Summary( $maxWords = 50 ) {
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// split the string into tags and words
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$parts = Convert::xml2array( $this->value );
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// store any unmatched tags
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$tagStack = array();
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$pIndex = 0;
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// find the first paragraph tag
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for( $i = 0; $i < count( $parts ); $i++ )
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if( strpos( $parts[$i], '<p' ) === 0 ) {
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$pIndex = $i;
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break;
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}
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$summary = '';
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$words = 0;
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// create the summary, keeping track of opening and closing tags
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while( $words <= $maxWords && $pIndex < count( $parts ) ) {
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if( $parts[$pIndex] == '</p>' ) {
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$summary .= $parts[$pIndex];
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break;
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}
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elseif( preg_match( '/<\/(\w+)>/', $parts[$pIndex], $endTag ) && $endTag[1] == substr( $tagStack[count($tagStack) - 1], 1, strlen( $endTag[1] ) ) ) {
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array_pop( $tagStack );
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$words++;
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$summary .= $parts[$pIndex++];
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} elseif( preg_match( '/^<\w+/', $parts[$pIndex] ) ) {
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array_push( $tagStack, $parts[$pIndex] );
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$words++;
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$summary .= $parts[$pIndex++];
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} else
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$summary .= $parts[$pIndex++] . ' ';
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}
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// make sure that the summary is well formed XHTML by closing tags
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while( $openTag = array_pop( $tagStack ) ) {
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preg_match( '/^<(\w+)\s+/', $openTag, $tagName );
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if(sizeof($tagName) > 0)
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$summary .= "</{$tagName[1]}>";
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}
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return $summary;
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}
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}
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?>
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