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#!/usr/bin/php -q
<?php
/**
* This is a minification script. It minifies the desired script "in-place"
*
* Usage (Unix): ./minify file1 file2 ...
* Usage (Windows): C:\php\php.exe minify file1 file2 ...
*
* The minification is medium, and it can over halve a scripts size.
* Combined with subsequent gzip compression the results can be excellent. For
* example a 70k script of mine was reduced to just 7k. (!) Substantial
* bandwidth savings for you, and much improved performance for your users.
*
* NOTE: Usage on Windows works, but is less tested
*/
/**
* Check for arg
*/
if (empty($_SERVER['argv'][1])) {
echo "RGraph minification script\n";
echo "==========================\n";
echo "Usage (Unix): " . $_SERVER['argv'][0] . " file1 file2 ...\n";
echo "Usage (Windows): C:\php\php.exe " . $_SERVER['argv'][0] . " file1 file2 ...\n\n";
exit;
} else {
for ($i=1; $i<count($_SERVER['argv']); ++$i) {
Minify($_SERVER['argv'][$i]);
}
}
/**
* This is the function that does the work of minifying the file
*
* @param $filename string The filename to be minified
*/
function Minify($filename)
{
/**
* Begin
*/
$original = file_get_contents($filename);
$new = preg_replace('/^ +/m', '', $original); // Lose spaces at the start of lines
$new = preg_replace('/ *\/\/.*$/m', '', $new); // Lose comments of the style: "// ..."
$new = preg_replace("/;\r?\n/m", ";\r\n", $new); // Make all lines end with \r\n
//$new = preg_replace("|\r\n\*|", "", $new);
/**
* Get rid of block comments
*/
$out = '';
$inBlock = false; // Are we in a block comment
for ($i=0; $i<strlen($new); $i++) {
if (substr($new, $i, 1) == '/') {
// Read the next char
if (!$inBlock AND substr($new, $i, 2) == '/*') {
$inBlock = true;
}
} elseif (substr($new, $i, 2) == '*/') {
$inBlock = false;
$i++;
continue;
}
if (!$inBlock) {
$out .= substr($new, $i, 1);
}
}
/**
* Get rid of double line breaks
*
* NOTE: Is this necessary?
*/
$out = preg_replace('|\n+|', "\n", $out);
/**
* Further tweaks
* UPDATED: 28th March 2009 - Line endings have been changed - they should all be \r\n
*/
$out = str_replace(";\r\n}", ';}', $out);
$out = str_replace(";\r\nRGraph", ';RGraph', $out);
$out = preg_replace('/;\r\n([a-z])/i', ';$1', $out);
$out = str_replace('if (', 'if(', $out);
$out = str_replace(') {', '){', $out);
$out = str_replace("}\r\n", '}', $out);
$out = str_replace("{\r\n", '{', $out); // UPDATED
$out = str_replace("{\r\n", '{', $out); // UPDATED
$out = str_replace("}\r\n}", '}}', $out); // UPDATED
$out = str_replace("}\r\n}", '}}', $out); // UPDATED
$out = str_replace("}\r\n}", '}}', $out); // UPDATED
$out = preg_replace('/ {2,}= /', ' = ', $out);
// Mark the file as minified
$out = "// THIS FILE HAS BEEN MINIFIED\r\n" . $out;
file_put_contents($filename, $out);
printf(" Minifying {$filename} Before: %s After: %s Saving: %d%%\n", number_format(strlen($original)), number_format(strlen($out)), number_format((((strlen($original) - strlen($out)) / strlen($original)) * 100), 1));
}
?>
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