<?php
/**
* 去除代码中的空白和注释
* @param string $content 代码内容
* @return string
*/
function strip_whitespace($content) {
$stripstr = '';
//分析php源码
$tokens = token_get_all($content);
$last_space = false;
for ($i = 0, $j = count($tokens); $i < $j; $i++) {
if (is_string($tokens[$i])) {
$last_space = false;
$stripstr .= $tokens[$i];
} else {
switch ($tokens[$i][0]) {
//过滤各种php注释
case t_comment:
case t_doc_comment:
break;
//过滤空格
case t_whitespace:
if (!$last_space) {
$stripstr .= ' ';
$last_space = true;
}
break;
case t_start_
heredoc:
$stripstr .= "<<
break;
case t_end_heredoc:
$stripstr .= "think;n";
for($k = $i+1; $k < $j; $k++) {
if(is_string($tokens[$k]) && $tokens[$k] == ';') {
$i = $k;
break;
} else if($tokens[$k][0] == t_close_tag) {
break;
}
}
break;
default:
$last_space = false;
$stripstr .= $tokens[$i][1];
}
}
}
return $stripstr;
}