PHP文件去掉PHP注释空格的函数分析(PHP代码压缩)_php技巧

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;
default:
$last_space = false;
$stripStr .= $tokens[$i][1];
}
}
}
return $stripStr;
}