钩子

在模版文件中经常看到调用钩子的用法
如：

<!--{hook/global_usernav_extra2}-->

这行代码在模版解析文件中会如此解析：

$template = preg_replace("/\{hook\/(\w+?)(\s+(.+?))?\}/ie", "\$this->hooktags('\\1', '\\3')", $template);

可以看到是直接调用$this->hooktags方法，那hooktags是怎么定义的呢？请看：

 function hooktags($hookid, $key = '') {
 global $_G;
 $i = count($this->replacecode['search']);
 $this->replacecode['search'][$i] = $search = "<!--HOOK_TAG_$i-->";
 $dev = '';
 if(isset($_G['config']['plugindeveloper']) && $_G['config']['plugindeveloper'] == 2) {
 $dev = "echo '<hook>[".($key ? 'array' : 'string')." $hookid".($key ? '/\'.'.$key.'.\'' : '')."]</hook>';";
 }
 $key = $key !== '' ? "[$key]" : '';
 $this->replacecode['replace'][$i] = "<?php {$dev}if(!empty(\$_G['setting']['pluginhooks']['$hookid']$key)) echo \$_G['setting']['pluginhooks']['$hookid']$key;?>";
 return $search;
 }

钩子

在模版文件中经常看到调用钩子的用法
如：

<!--{hook/global_usernav_extra2}-->

这行代码在模版解析文件中会如此解析：

$template = preg_replace("/\{hook\/(\w+?)(\s+(.+?))?\}/ie", "\$this->hooktags('\\1', '\\3')", $template);

可以看到是直接调用$this->hooktags方法，那hooktags是怎么定义的呢？请看：

 function hooktags($hookid, $key = '') {
 global $_G;
 $i = count($this->replacecode['search']);
 $this->replacecode['search'][$i] = $search = "<!--HOOK_TAG_$i-->";
 $dev = '';
 if(isset($_G['config']['plugindeveloper']) && $_G['config']['plugindeveloper'] == 2) {
 $dev = "echo '<hook>[".($key ? 'array' : 'string')." $hookid".($key ? '/\'.'.$key.'.\'' : '')."]</hook>';";
 }
 $key = $key !== '' ? "[$key]" : '';
 $this->replacecode['replace'][$i] = "<?php {$dev}if(!empty(\$_G['setting']['pluginhooks']['$hookid']$key)) echo \$_G['setting']['pluginhooks']['$hookid']$key;?>";
 return $search;
 }