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).
php_strip_whitespace
(PHP 5, PHP 7)
php_strip_whitespace — Retourne la source sans commentaires, ni espaces blancs
Description
string php_strip_whitespace
( string
$filename
)
Retourne le code source PHP du paramètre filename
en ayant supprimé les commentaires ainsi que les espaces. Cela peut être
utile pour comparer la quantité de code avec la quantité de commentaire dans
votre code. Cela revient à utiliser la commande php -w
depuis la ligne de commande.
Liste de paramètres
-
filename -
Chemin vers le fichier PHP.
Valeurs de retour
Le code source nettoyé sera retourné en cas de succès ou une chaîne vide en cas d'échec.
Note:
Cette fonction fonctionne comme décrite depuis PHP 5.0.1. Avant, elle ne retournait qu'une chaîne vide. Pour plus de détails concernant ce bogue ainsi que son comportement précédent, lisez le rapport de bogue » #29606.
Exemples
Exemple #1 Exemple avec php_strip_whitespace()
<?php
// Commentaire PHP ici
/*
* Un autre commentaire PHP
*/
echo php_strip_whitespace(__FILE__);
// Les nouvelles lignes sont considérées comme des espaces et sont donc également effacées :
do_nothing();
?>
L'exemple ci-dessus va afficher :
<?php echo php_strip_whitespace(__FILE__); do_nothing(); ?>
Notez que les commentaires PHP ne sont plus là, tout comme les espaces et les nouvelles lignes après le premier echo.
add a note
User Contributed Notes 5 notes
Jouni ¶
9 years ago
gelamu at gmail dot com ¶
8 years ago
With this function You can compress Your PHP source code.
<?php
function compress_php_src($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($src));
?>
And the result is:
string(125) "<?php for(=0;<99;++){echo "i=\n";}function abc(){return "abc";};abc(); ?>
<h1><?="Some text ".str_repeat("_-x-_ ",32)?></h1>"
rob (dot) bast at gmail ¶
2 years ago
It should be pointed out that this function does not work on files that make use of the short tag notation (<?).
flconseil at yahoo dot fr ¶
10 years ago
Beware that this function uses the output buffering mechanism.
If you give a 'stream wrapped' path as argument, anything echoed by the stream wrapper during this call (e.g. trace messages) won't be displayed to the screen but will be inserted in php_strip_whitespace's result.
If you execute this stripped code later, it will display the messages which should have been output during php_strip_whitespace's execution !
TK ¶
7 years ago
I was looking earlier for a way to strip php comments from my source files but didn't come up with much. I wrote the following function to do the trick using the tokenizer. I've tested in on an entire phpMyAdmin install and it worked fine afterward... so it should be good to go. You may also specify any number of tokens to strip such as T_WHITESPACE rather the default of T_COMMENT and T_DOC_COMMENT.
Hopefully someone finds it useful.
<?php
function strip_tokens($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
?>
