本文实例讲述了php实现简单的语法高亮函数。分享给大家供大家参考。具体分析如下:
这是一个php实现的简单语法高亮显示的函数,注意:这个函数设计的比较简单,可能对某些语法不能高亮显示,你可以自己扩充该函数的功能
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function syntax_highlight( $code ){ // this matches --> "foobar" <-- $code = preg_replace( '/"(.*?)"/U' , '"<span style="color: #007F00">$1</span>"' , $code ); // hightlight functions and other structures like --> function foobar() <--- $code = preg_replace( '/(\s)\b(.*?)((\b|\s)\()/U' , '$1<span style="color: #0000ff">$2</span>$3' , $code ); // Match comments (like /* */): $code = preg_replace( '/(\/\/)(.+)\s/' , '<span style="color: #660066; background-color: #FFFCB1;"><i>$0</i></span>' , $code ); $code = preg_replace( '/(\/\*.*?\*\/)/s' , '<span style="color: #660066; background-color: #FFFCB1;"><i>$0</i></span>' , $code ); // hightlight braces: $code = preg_replace( '/(\(|\[|\{|\}|\]|\)|\->)/' , '<strong>$1</strong>' , $code ); // hightlight variables $foobar $code = preg_replace( '/(\$[a-zA-Z0-9_]+)/' , '<span style="color: #0000B3">$1</span>' , $code ); /* The \b in the pattern indicates a word boundary, so only the distinct ** word "web" is matched, and not a word partial like "webbing" or "cobweb" */ // special words and functions $code = preg_replace( '/\b(print|echo|new|function)\b/' , '<span style="color: #7F007F">$1</span>' , $code ); return $code ; } /*example-start*/ /* ** Create some example PHP code: */ $example_php_code = ' // some code comment: $example = "foobar" ; print $_SERVER [ "REMOTE_ADDR" ]; $array = array (1, 2, 3, 4, 5); function example_function( $str ) { // reverse string echo strrev ( $obj ); } print example_function( "foo" ); /* ** A multiple line comment */ print "Something: " . $example ;'; // output the formatted code: print '<pre>' ; print syntax_highlight( $example_php_code ); print '</pre>' ; /*example-end*/ |
希望本文所述对大家的php程序设计有所帮助。