这篇文章主要介绍了php实现简单的语法高亮函数,实例分析了php通过正则表达式实现语法高亮的相关技巧,需要的朋友可以参考下
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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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 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>新闻热点
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