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HomeBackend DevelopmentPHP TutorialExample of how PHP recursively traverses folders to remove comments and compress php source code

这篇文章主要介绍了PHP递归遍历文件夹去除注释并压缩php源代码的方法,涉及php文件与目录的遍历、读取、判断及使用php_strip_whitespace函数删除注释的相关操作技巧,需要的朋友可以参考下

本文实例讲述了PHP递归遍历文件夹去除注释并压缩代码的方法。分享给大家供大家参考,具体如下:

<?php
// ===================文件夹 递归 去除PHP注释并压缩=========================
header("content-type:text/html;charset=utf-8");
$dir = "D:\sound\admin--";  // 需要转换的文件路径。
$fdir = "D:\sound\admin";  // 最终要放到的位置。
$dir = str_replace(&#39;\\&#39;,&#39;/&#39;,$dir);
$fdir = str_replace(&#39;\\&#39;,&#39;/&#39;,$fdir);
if($dir == $fdir){
 echo "源文件与现在文件路径冲突,换一个路径吧";
 exit;
}
$arr = array($dir,$fdir);
ergodic($dir,$arr); // 递归的时候目录名一直是改变的。所以用一个数组另外存储两个路径,这样创建文件或者目录的时候就可以找到在那个目录下。
md($fdir);
function md($md){ // 创建目录
 if(!is_dir($md) && !empty($md) ){
    mkdir($md,0777);
 }
}
// 递归
function ergodic($dirname,$arr){
  if(is_dir($dirname)){
    $handle = opendir($dirname);
    $a = $arr[1].substr($dirname,strlen($arr[0]) );
    md($a);
    while($filename = readdir($handle)){  // 读取一个打开的文件名。
      if($filename != &#39;.&#39; && $filename != &#39;..&#39;){
        $dir = $dirname.&#39;/&#39;.$filename; // 拼接目录名
        if(is_dir($dir)){
          ergodic($dir,$arr);  // 递归
        }else{
          file_put_contents($a.&#39;/&#39;.$filename,replace_php_src($dir) );
          echo $dir."  去注释压缩完成!<br>";
        }
      }
    }
  }else{
    // 此处无用(因为来的都是目录),如果只转换一个文件,就可以这样使用。
   file_put_contents($arr[1].&#39;/&#39;.$dirname,replace_php_src($arr[0].&#39;/&#39;.$dirname) );
  }
}
// 去除注释并压缩,heredoc存在的时候去注释不压缩。
function replace_php_src($src){
  $contents = file_get_contents($src);
  $num = substr_count($contents,&#39;<<<&#39;);  // heredoc 是否存在。
  $str = "";
  if($num > 0){  // heredoc 存在。只去除注释不压缩。
      $file = token_get_all($contents); // token_get_all() 将提供的源码按 PHP 标记进行分割.
      for ($i=0; $i < count($file); $i++) {
        if( is_string($file[$i]) ){
          $str .= $file[$i];
        }else{
           $name = token_name( $file[$i][0] ); // token_name() 获取提供的 PHP 解析器代号的符号名称.
            if($name == &#39;T_COMMENT&#39; || $name == &#39;T_DOC_COMMENT&#39; ){ // 去除注释
                continue;
            }else{
              $str .= $file[$i][1];
            }
        }
      }
  }else{
    $str = php_strip_whitespace($src); // 不存在 heredoc 。因为他会错误解析。
  }
  return $str;
}

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