php_check_syntax
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_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
string php_strip_whitespace
( string $filename
)
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。
返り値
成功した場合に処理済みのソースコード、失敗した場合に空の文字列を返します。
注意: PHP 5.0.1 以降、この関数は記述どおりに動作するようになりました。 それまでは単に空の文字列を返すだけでした。このバグについての詳細な情報は、 バグ番号 » 29606 を参照ください。
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 Notesphp_strip_whitespace
gelamu at gmail dot com
10-Apr-2008 11:12
10-Apr-2008 11:12
Jouni
03-Oct-2007 02:14
03-Oct-2007 02:14
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).
Zvjezdan Patz
14-Sep-2007 05:14
14-Sep-2007 05:14
I was given a report that was separated by spaces and asked to make graphs from it. I needed to turn the report data into a csv in memory so I could manipulate it further.
First needed to see the report, then need to strip out the whitespace, but leave one space between each item that I could convert to a column.
There were lots of complicated ways to do this. I stumbled on something simple.
Say the report looks like this:
Monday Tuesday Wednesday Thursday Friday Saturday Sunday
1 5 7 8 10 7 8
7 15 4 0 21 4 12
9 5 7 9 0 9 43
The report is using spaces and not tabs to separate everything. Assume it's a file called data.txt you can use the following to strip out the spaces and make it comma delimited:
<?php
$handle = @fopen("data.txt", "r");
if ($handle)
{
while (!feof($handle))
{
$buffer = fgets($handle, 4096);
// this will search for 5 spaces and replace with 1, then 4, then 3, then 2
// then only one will be left. Replace that one space with a comma
// then output with nl2br so you can see the line breaks
print nl2br(str_replace(" ", ",",ereg_replace( ' ', ' ',ereg_replace( ' ', ' ', ereg_replace( ' ', ' ', ereg_replace( ' ',' ',$buffer ))))));
}
}
fclose($handle);
?>
Hope that helps someone else.
natio at phpfox dot com
06-Sep-2007 08:21
06-Sep-2007 08:21
Notice: In my last comment for this function I failed to add some important parts of the function. So I have re-added it here. Feel free to delete my earlier comment. Thanks!
---
To use php_strip_whitespace in (PHP 4 >= 4.2.0) you could try the function below. This function also helps solve the issues with php_strip_whitespace not fully removing new lines and extra whitespace's in HTML when embedded with PHP.
<?php
if (!defined ('T_ML_COMMENT'))
{
define ('T_ML_COMMENT', T_COMMENT);
}
if (!defined ('T_DOC_COMMENT'))
{
define ('T_DOC_COMMENT', T_ML_COMMENT);
}
function StripWhitespace($sFileName)
{
if ( !is_file($sFileName) )
{
return false;
}
$sContent = implode('', file($sFileName));
$aTokens = token_get_all($sContent);
$bLast = false;
$sStr = '';
for ( $i = 0, $j = count($aTokens); $i < $j; $i++ )
{
if ( is_string($aTokens[$i]) )
{
$bLast = false;
$sStr .= $aTokens[$i];
}
else
{
switch ( $aTokens[$i][0] )
{
case T_COMMENT:
case T_ML_COMMENT:
case T_DOC_COMMENT:
break;
case T_WHITESPACE:
if (!$bLast)
{
$sStr .= ' ';
$bLast = true;
}
break;
default:
$bLast = false;
$sStr .= $aTokens[$i][1];
break;
}
}
}
$sStr = trim($sStr);
$sStr = str_replace("\n", "", $sStr);
$sStr = str_replace("\r", "", $sStr);
return $sStr;
}
?>
nyctimus at yahoo dot com
03-May-2007 11:01
03-May-2007 11:01
Here's one for CSS:
<?php
function css_strip_whitespace($css)
{
$replace = array(
"#/\*.*?\*/#s" => "", // Strip C style comments.
"#\s\s+#" => " ", // Strip excess whitespace.
);
$search = array_keys($replace);
$css = preg_replace($search, $replace, $css);
$replace = array(
": " => ":",
"; " => ";",
" {" => "{",
" }" => "}",
", " => ",",
"{ " => "{",
";}" => "}", // Strip optional semicolons.
",\n" => ",", // Don't wrap multiple selectors.
"\n}" => "}", // Don't wrap closing braces.
"} " => "}\n", // Put each rule on it's own line.
);
$search = array_keys($replace);
$css = str_replace($search, $replace, $css);
return trim($css);
}
?>
A word on the first regular expression, since it took me a while.
It strips C style comments. /* Like this. */
#/\*.*?\*/#s
^ ^
The pound signs at either end quote the regex. They don't match anything.
#/\*.*?\*/#s
^
The s at the very end sets the PCRE_DOTALL modifier. More info here:
http://www.php.net/manual/en/reference.pcre.pattern.modifiers.php
# /\* .*? \*/ #s
1 2 3
The expression itself consists of 3 parts:
1. the opening comment sequence, represented by /\*
2. everything in the middle, represented by .*?
3. and the closing comment sequence, represented by \*/
#/\*.*?\*/#s
^ ^
The comment asterisks are escaped. If I had used the more common / for PCRE quoting I would've had to escape those too.
#/\*.*?\*/#s
^
The ? prevents the regex from being greedy. See halfway down this page:
http://www.php.net/manual/en/reference.pcre.pattern.syntax.php
flconseil at yahoo dot fr
08-Jul-2006 05:57
08-Jul-2006 05:57
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 !
mwwaygoo AT hotmail DOT com
27-Apr-2006 06:17
27-Apr-2006 06:17
I thought this was a nice function until I realised it wouldnt strip down html. As i'd been reading an article on compressing output to speed up delivery.
So I wrote a little one to do that for me. Here its is, incase people were looking for a html version. It may need tweaking, like with existing 's.
<?php
function strip_html($data)
{
// strip unecessary comments and characters from a webpages text
// all line comments, multi-line comments \\r \\n \\t multi-spaces that make a script readable.
// it also safeguards enquoted values and values within textareas, as these are required
$data=preg_replace_callback("/>[^<]*<\\/textarea/i", "harden_characters", $data);
$data=preg_replace_callback("/\\"[^"<>]+\\"/", "harden_characters", $data);
$data=preg_replace("/(//.*n)/","",$data); // remove single line comments, like this, from // to \\n
$data=preg_replace("/(t|r|n)/","",$data); // remove new lines \\n, tabs and \\r
$data=preg_replace("/(/*.**/)/","",$data); // remove multi-line comments /* */
$data=preg_replace("/(<![^>]*>)/","",$data); // remove multi-line comments <!-- -->
$data=preg_replace('/(\\s+)/', ' ',$data); // replace multi spaces with singles
$data=preg_replace('/>\\s</', '><',$data);
$data=preg_replace_callback("/"[^\\"<>]+"/", "unharden_characters", $data);
$data=preg_replace_callback("/>[^<]*<\\/textarea/", "unharden_characters", $data);
return $data;
}
function harden_characters($array)
{
$safe=$array[0];
$safe=preg_replace('/\\n/', "%0A", $safe);
$safe=preg_replace('/\\t/', "%09", $safe);
$safe=preg_replace('/\\s/', " ", $safe);
return $safe;
}
function unharden_characters($array)
{
$safe=$array[0];
$safe=preg_replace('/%0A/', "\\n", $safe);
$safe=preg_replace('/%09/', "\\t", $safe);
$safe=preg_replace('/ /', " ", $safe);
return $safe;
}
?>
The article code was similar to this, which shouldn't work as php_strip_whitespace takes a filename as input:-
<?php
// ob_start(); and output here
$data=ob_get_contents();
ob_end_clean();
if(strstr($_SERVER['HTTP_ACCEPT_ENCODING'],'gzip'))
{
$data=gzencode(php_strip_whitespace($data),9);
header('Content-Encoding: gzip');
}
echo $data;
?>
dnc at seznam dot cz
22-Oct-2005 12:01
22-Oct-2005 12:01
This function can not be used to strip comments outside <?php ... ?>
// this comment will not be removed
<?php
// this comment will be removed
?>
amedee at amedee dot be
09-Jul-2005 02:29
09-Jul-2005 02:29
Not only can this be used for JavaScript files, but also for:
* Java source code
* CSS (Style Sheets)
* Any file with C-style comments.