PHP源码压缩函数-官方版本

压缩函数：

<?php
function compress_php_src($src) {
    // Whitespaces left and right from this signs can be ignored
    static $IW = array(
        T_CONCAT_EQUAL,             // .=
        T_DOUBLE_ARROW,             // =>
        T_BOOLEAN_AND,              // &&
        T_BOOLEAN_OR,               // ||
        T_IS_EQUAL,                 // ==
        T_IS_NOT_EQUAL,             // != or <>
        T_IS_SMALLER_OR_EQUAL,      // <=
        T_IS_GREATER_OR_EQUAL,      // >=
        T_INC,                      // ++
        T_DEC,                      // --
        T_PLUS_EQUAL,               // +=
        T_MINUS_EQUAL,              // -=
        T_MUL_EQUAL,                // *=
        T_DIV_EQUAL,                // /=
        T_IS_IDENTICAL,             // ===
        T_IS_NOT_IDENTICAL,         // !==
        T_DOUBLE_COLON,             // ::
        T_PAAMAYIM_NEKUDOTAYIM,     // ::
        T_OBJECT_OPERATOR,          // ->
        T_DOLLAR_OPEN_CURLY_BRACES, // ${
        T_AND_EQUAL,                // &=
        T_MOD_EQUAL,                // %=
        T_XOR_EQUAL,                // ^=
        T_OR_EQUAL,                 // |=
        T_SL,                       // <<
        T_SR,                       // >>
        T_SL_EQUAL,                 // <<=
        T_SR_EQUAL,                 // >>=
    );
    if(is_file($src)) {
        if(!$src = file_get_contents($src)) {
            return false;
        }
    }
    $tokens = token_get_all($src);
    
    $new = "";
    $c = sizeof($tokens);
    $iw = false; // ignore whitespace
    $ih = false; // in HEREDOC
    $ls = "";    // last sign
    $ot = null;  // open tag
    for($i = 0; $i < $c; $i++) {
        $token = $tokens[$i];
        if(is_array($token)) {
            list($tn, $ts) = $token; // tokens: number, string, line
            $tname = token_name($tn);
            if($tn == T_INLINE_HTML) {
                $new .= $ts;
                $iw = false;
            } else {
                if($tn == T_OPEN_TAG) {
                    if(strpos($ts, " ") || strpos($ts, "\n") || strpos($ts, "\t") || strpos($ts, "\r")) {
                        $ts = rtrim($ts);
                    }
                    $ts .= " ";
                    $new .= $ts;
                    $ot = T_OPEN_TAG;
                    $iw = true;
                } elseif($tn == T_OPEN_TAG_WITH_ECHO) {
                    $new .= $ts;
                    $ot = T_OPEN_TAG_WITH_ECHO;
                    $iw = true;
                } elseif($tn == T_CLOSE_TAG) {
                    if($ot == T_OPEN_TAG_WITH_ECHO) {
                        $new = rtrim($new, "; ");
                    } else {
                        $ts = " ".$ts;
                    }
                    $new .= $ts;
                    $ot = null;
                    $iw = false;
                } elseif(in_array($tn, $IW)) {
                    $new .= $ts;
                    $iw = true;
                } elseif($tn == T_CONSTANT_ENCAPSED_STRING
                       || $tn == T_ENCAPSED_AND_WHITESPACE)
                {
                    if($ts[0] == '"') {
                        $ts = addcslashes($ts, "\n\t\r");
                    }
                    $new .= $ts;
                    $iw = true;
                } elseif($tn == T_WHITESPACE) {
                    $nt = @$tokens[$i+1];
                    if(!$iw && (!is_string($nt) || $nt == '$') && !in_array($nt[0], $IW)) {
                        $new .= " ";
                    }
                    $iw = false;
                } elseif($tn == T_START_HEREDOC) {
                    $new .= "<<<S\n";
                    $iw = false;
                    $ih = true; // in HEREDOC
                } elseif($tn == T_END_HEREDOC) {
                    $new .= "S;";
                    $iw = true;
                    $ih = false; // in HEREDOC
                    for($j = $i+1; $j < $c; $j++) {
                        if(is_string($tokens[$j]) && $tokens[$j] == ";") {
                            $i = $j;
                            break;
                        } else if($tokens[$j][0] == T_CLOSE_TAG) {
                            break;
                        }
                    }
                } elseif($tn == T_COMMENT || $tn == T_DOC_COMMENT) {
                    $iw = true;
                } else {
                    if(!$ih) {
                        $ts = strtolower($ts);
                    }
                    $new .= $ts;
                    $iw = false;
                }
            }
            $ls = "";
        } else {
            if(($token != ";" && $token != ":") || $ls != $token) {
                $new .= $token;
                $ls = $token;
            }
            $iw = true;
        }
    }
    return $new;
}
?>

使用方法：

<?php

$src = <<<EOT
<?php
//循环
for ( $i = 0; $i < 99; $i ++ ) {
   echo "i=${ i }\n";
   /* 省略代码... */
}
/** 函数说明 */
function abc() {
   return   "abc";
};

abc();
?>
<h1><?= "Some text " . str_repeat("_-x-_ ", 32); ?></h1>
EOT;
var_dump(compress_php_src($src));
?>

处理结果：

string(125) "<?php for(=0;<99;++){echo "i=\n";}function abc(){return "abc";};abc(); ?>
<h1><?="Some text ".str_repeat("_-x-_ ",32)?></h1>"

此函数由点滴网(http://www.hehelw.com/)整理提供。