zuitu团购模板引擎浅析_PHP教程

     接触过最土的朋友应该很熟悉  最土模板解析功能主要由 文件完成 ，就是通过正则的替换，捕获来完成而已，与smarty的原理类似。下面分析下他的正则替换。

         在template.php文件中有这段代码

<span> <span function> __parse(<span>,<span><span><span> 
<span>     <span> = <span false><span><span> 
<span>     <span if>(!(<span> = <span file_get_contents>(<span><span><span>         <span return> <span false><span><span> 
<span>     <span> = <span preg_replace>( '/^()/', '', <span> ); <span><span efbbbf>
<span>     <span> = <span preg_replace>("/<!--s*\${(.+?)}s*-->/ies", "__replace('<?php \1; ?>')", <span><span><span>     <span> = <span preg_replace>("/{(\$[a-zA-Z0-9_[]\ -',%*/.()>'"$-�]+)}/s", "<?php echo \1; ?>", <span><span><span>     <span> = <span preg_replace>("/\${(.+?)}/ies", "__replace('<?php echo \1; ?>')", <span><span><span>     <span> = <span preg_replace>("/<!--s*{elses*ifs+(.+?)}s*-->/ies", "__replace('<?php } else if(\1) { ?>')", <span><span><span>     <span> = <span preg_replace>("/<!--s*{elifs+(.+?)}s*-->/ies", "__replace('<?php } else if(\1) { ?>')", <span><span><span>     <span> = <span preg_replace>("/<!--s*{else}s*-->/is", "<?php } else { ?>", <span><span><span> 
<span>     <span for>(<span> = 0; <span> < 5; ++<span><span><span>         <span> = <span preg_replace>("/<!--s*{loops+(S+)s+(S+)s+(S+)s*}s*-->(.+?)<!--s*{/loop}s*-->/ies", "__replace('<?php if(is_array(\1)){foreach(\1 AS \2=>\3) { ?>\4<?php }}?>')", <span><span><span>         <span> = <span preg_replace>("/<!--s*{loops+(S+)s+(S+)s*}s*-->(.+?)<!--s*{/loop}s*-->/ies", "__replace('<?php   if(is_array(\1)){foreach(\1 AS \2) { ?>\3<?php }}?>')", <span><span><span>         <span> = <span preg_replace>("/<!--s*{ifs+(.+?)}s*-->(.+?)<!--s*{/if}s*-->/ies", "__replace('<?php if(\1){?>\2<?php }?>')", <span><span><span>     
<span> <span><span>     <span><span add for call othertpl>
<span>     <span> = <span preg_replace>("#<!--s*{s*includes+([^{}]+)s*}s*-->#i", '<?php include template("\1");?>', <span><span><span> 
<span>     <span><span add value namespace>
<span>     <span if>(!<span file_put_contents>(<span>,<span><span><span>         <span return> <span false><span><span>     
<span> 
<span>     <span return> <span true><span><span> <span><span> 
<span> <span function> __replace(<span><span><span>     <span return> <span str_replace>('"', '"', <span><span><span> }</span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span>

现在对正则替换进行分析：

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第8行

<span> = <span preg_replace>( '/^()/', '', <span> ); </span></span></span>

是过滤掉windows平台下utf8文件的特殊字符 ï  » ¿

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第九行

<span> = <span preg_replace>("/<!--s*\${(.+?)}s*-->/ies", "__replace('<?php \1; ?>')", <span>);</span></span></span>

规则浅析：

  转为  

第17行

 <span> = <span preg_replace>("/<!--s*{loops+(S+)s+(S+)s+(S+)s*}s*-->(.+?)<!--s*{/loop}s*-->/ies", "__replace('<?php if(is_array(\1)){foreach(\1 AS \2=>\3) { ?>\4<?php }}?>')", <span>);</span></span></span>

>

第18行与第17行差不多就是少了$k其他完全一样

第19行

<span> = <span preg_replace>("/<!--s*{ifs+(.+?)}s*-->(.+?)<!--s*{/if}s*-->/ies", "__replace('<?php if(\1){?>\2<?php }?>')", <span>);</span></span></span>