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php开发问题-class_exists

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Release： 2016-06-23 13:15:37
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        判断类是否存在的时候，提示错误信息 找不到文件  include(XXXXX.php): failed to open stream: No such file or directory

所有在使用class_exists时先要判断类的文件是否存在，代码如下：

file_exists('../xxxx/'.$class_name)&&class_exists($class_name)
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