How PHP adds a span tag to a specified set of keywords, span tab _php Tutorial

The method by which PHP adds a span tag to a specified set of keywords, the span tag

This example describes how PHP adds a span tag to a specified set of keywords. Share to everyone for your reference. Specific as follows:

This is PHP to a set of keywords to add a span tag, highlighting keywords

Example use: $spanned = codewords ($string _containing_keywords);//My site:andrew.dx.am//Using colour==blue, but Diffe Rent arrays of words and different//colours can be added.function onlywholewords (& $value, $key) {//ignores words AF ter//Comment delimiters.//$value = "/\b (". $value.  ") \b/"; doesn ' t handle comments//$value = "/^ (?:(?! \/\/).) *\k\b (". $value. ") \b/"; \k Lookbehind Alternative is not supported in PHP < 5.2.4, so use: $value = "/^ (?:(?! \/\/).) *) \b ". $value. "\b/";} Function Addspan (& $value, $key, $color = ' blue ') {$value = "$" . $value. "";} function codewords ($code) {$keywords = array (' As ', ' break ', ' case ', ' class ', ' Continue ', ' default ', ' Do ', ' elif ', ' else ', ' ElseIf ', ' for ', ' foreach ', ' function ', ' if ', ' new ', ' null ', ' return ', ' self ', ' switch ', ' the ', ' to ', ' typeof ', ' U '  Ntil ', ' var ', ' void ', ' while ', ' with ');  $keywords 2 = $keywords;  Array_walk ($keywords, ' onlywholewords ');  Array_walk ($keywords 2, ' Addspan ', ' Blue ');  $code = Preg_replace ($keywords, $keywords 2, $code); return $code;}

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