PHP methods for file operations and string encryption

This article mainly introduces PHP's methods for file operations and string encryption. Interested friends can refer to it. I hope it will be helpful to everyone.

The example of this article describes the method of implementing source code encryption in PHP. The specific implementation method is as follows:

\'.$'.$q1.'($'.$q3.'($'.$q4.'($'.$q2.',$'.$q5.'*2),$'.$q4.'($'.$q2.',$'.$q5.',$'.$q5.'),$'.$q4.'($'.$q2.',0,$'.$q5.'))));').'"));'; $s=''; echo $s; //生成 加密后的PHP文件 !is_dir('create/') && mkdir('create/'); $fpp1 = fopen('create/'.$filename,'w'); fwrite($fpp1,$s) or die('写文件错误'); echo '加密成功！';

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