71 lines
1.6 KiB
PHP
71 lines
1.6 KiB
PHP
<?php
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class Markdown
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{
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static function processing($string)
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{
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$string = self::replaceHeaders($string);
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$string = self::replaceBoldItalic($string);
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$string = self::replaceBold($string);
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$string = self::replaceItalic($string);
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$string = self::replaceUnderline($string);
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$string = self::replaceUrls($string);
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return $string;
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}
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static private function replaceHeaders($string)
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{
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for ($index = 3; $index > 0; $index--) {
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$pr = '/(^#{' . $index . '} .{1,})/m';
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preg_match_all($pr, $string, $headers);
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if (isset($headers[0][0])) {
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foreach ($headers[0] as $header) {
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$hI = $index+1;
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$string = str_replace($header, "<h$hI>" . mb_substr($header, $index + 1, NULL, 'UTF-8') . "</h$hI>", $string);
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}
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}
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}
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return $string;
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}
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static private function replaceBoldItalic($string)
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{
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$pr = '(\*{3}(.+?)\*{3})';
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$rep = '<b><i>$1</i></b>';
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return preg_replace($pr, $rep, $string);
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}
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static private function replaceBold($string)
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{
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$pr = '(\*{2}(.+?)\*{2})';
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$rep = '<b>$1</b>';
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return preg_replace($pr, $rep, $string);
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}
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static private function replaceItalic($string)
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{
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$pr = '(\*{1}(.+?)\*{1})';
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$rep = '<i>$1</i>';
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return preg_replace($pr, $rep, $string);
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}
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static private function replaceUnderline($string)
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{
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$pr = '(\_{1}(.+?)\_{1})';
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$rep = '<u>$1</u>';
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return preg_replace($pr, $rep, $string);
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}
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static private function replaceUrls($string)
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{
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$pr = '((https{0,1}:\/\/[\da-z\.-]+\.[a-z]{2,6})[\/\w\?=&#%+\.,-]*\/?)';
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$rep = '<a href="$0" target="_blank">$1</a>';
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return preg_replace($pr, $rep, $string);
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}
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}
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