With this function You can compress Your PHP source code.
<?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;
}
?>
For example:
<?php
$src = <<<EOT
<?php
// some comment
for ( $i = 0; $i < 99; $i ++ ) {
echo "i=${ i }\n";
/* ... */
}
/** ... */
function abc() {
return "abc";
};
abc();
?>
<h1><?= "Some text " . str_repeat("_-x-_ ", 32);;; ?></h1>
EOT;
var_dump(compress_php_src($src));
?>
And the result is:
string(125) "<?php for(=0;<99;++){echo "i=\n";}function abc(){return "abc";};abc(); ?>
<h1><?="Some text ".str_repeat("_-x-_ ",32)?></h1>"
php_strip_whitespace
(PHP 5, PHP 7, PHP 8)
php_strip_whitespace — コメントと空白文字を取り除いたソースを返す
説明
PHP のソースコード filename からコメントと
空白文字を取り除いたものを返します。これは、スクリプトの中で
実際のコードの量がどれくらいなのかを知るのに役立つでしょう。
これは コマンドライン
から php -w を実行するのと同じです。
パラメータ
-
filename -
PHP ファイルへのパス。
例
例1 php_strip_whitespace() の例
<?php
// これは PHP のコメントです
/*
* これも PHP のコメントです
*/
echo php_strip_whitespace(__FILE__);
// 改行は空白文字と同じ扱いで、取り除かれます
do_nothing();
?>上の例の出力は以下となります。
<?php echo php_strip_whitespace(__FILE__); do_nothing(); ?>
PHP のコメントが削除されていること、 最初の echo 文の後の改行や空白文字が削除されていることに注目しましょう。
add a note
User Contributed Notes 5 notes
gelamu at gmail dot com ¶
16 years ago
Jouni ¶
17 years ago
If you wish to just remove excess whitespace from a string, see the example "Strip whitespace" in the preg_replace documentation (http://www.php.net/manual/en/function.preg-replace.php).
flconseil at yahoo dot fr ¶
18 years ago
Beware that this function uses the output buffering mechanism.
If you give a 'stream wrapped' path as argument, anything echoed by the stream wrapper during this call (e.g. trace messages) won't be displayed to the screen but will be inserted in php_strip_whitespace's result.
If you execute this stripped code later, it will display the messages which should have been output during php_strip_whitespace's execution !
razvan_bc at yahoo dot com ¶
5 years ago
i notice that on 45=75kb php file compressed using php_strip_whitespace i got slowest speed results in my apache benchmark .bat tests so doing on a normal php file 10 tests and another 10 tests on a compressed one ,calculating the math average value I got fastest results on normal php files.
well,seeing that results i think SO ,NICE,BUT IF WE COMBINE THESE "METHODS" : what if i use a partial minified method using this function ????
here is the code:
(if you run this in xampp and you are beginner you got a blank page in firefox ,but if you right click it then you click on the option "view source" you'll get the php partial stripped by comments and tabs) :
<?php
/* hi there !!!
here are the comments */
//another try
echo removecomments('index.php');
/* hi there !!!
here are the comments */
//another try
function removecomments($f){
$w=Array(';','{','}');
$ts = token_get_all(php_strip_whitespace($f));
$s='';
foreach($ts as $t){
if(is_array($t)){
$s .=$t[1];
}else{
$s .=$t;
if( in_array($t,$w) ) $s.=chr(13).chr(10);
}
}
return $s;
}
?>
TK ¶
15 years ago
I was looking earlier for a way to strip php comments from my source files but didn't come up with much. I wrote the following function to do the trick using the tokenizer. I've tested in on an entire phpMyAdmin install and it worked fine afterward... so it should be good to go. You may also specify any number of tokens to strip such as T_WHITESPACE rather the default of T_COMMENT and T_DOC_COMMENT.
Hopefully someone finds it useful.
<?php
function strip_tokens($code) {
$args = func_get_args();
$arg_count = count($args);
// if no tokens to strip have been specified then strip comments by default
if( $arg_count === 1 ) {
$args[1] = T_COMMENT;
$args[2] = T_DOC_COMMENT;
}
// build a keyed array of tokens to strip
for( $i = 1; $i < $arg_count; ++$i )
$strip[ $args[$i] ] = true;
// set a keyed array of newline characters used to preserve line numbering
$newlines = array("\n" => true, "\r" => true);
$tokens = token_get_all($code);
reset($tokens);
$return = '';
$token = current($tokens);
while( $token ) {
if( !is_array($token) )
$return.= $token;
elseif( !isset($strip[ $token[0] ]) )
$return.= $token[1];
else {
// return only the token's newline characters to preserve line numbering
for( $i = 0, $token_length = strlen($token[1]); $i < $token_length; ++$i )
if( isset($newlines[ $token[1][$i] ]) )
$return.= $token[1][$i];
}
$token = next($tokens);
} // while more tokens
return $return;
} // function
?>
