CSSCompression is a PHP based CSS minifier that analyzes stylesheets for various compressions. It finds possible CSS shorthand techniques for combination of properties.
require( 'src/CSSCompression.php' ); $compressed = CSSCompression::express( $css, 'sane' );
Or, if you need to run it multiple times
$CSSC = new CSSCompression( 'sane' ); $compressed = $CSSC->compress( $css );
Modes are pre-defined sets of options that can be set by passing in the mode name.
- Safe: (99% safe) Safe mode does zero combinations or organizing. It's the best mode if you use a lot of hacks.
- Sane: (90% safe) Sane mode does most combinations(multiple long hand notations to single shorthand), but still keeps most declarations in their place.
- Small: (65% safe) Small mode reorganizes the whole sheet, combines as much as it can, and will break most comment hacks.
- Full: (64% safe) Full mode does everything small does, but also converts hex codes to their short color name alternatives.
Here's a few different ways to initiate a mode.
// Express with safe mode $compressed = CSSCompression::express( $css, 'safe' ); // Creating new instance with sane mode $CSSC = new CSSCompression( 'sane' ); // Setting an instance with small mode $CSSC->mode( 'small' ); // Or compressing with the current instance, and setting full mode $compressed = $CSSC->compress( $css, 'full' );
Yes the compressor provides singleton access(separate from express), but use it wisely.
$CSSC = CSSCompression::getInstance(); // Or, if you want to keep named instances $rose_instance = CSSCompression::getInstance('rose'); $blue_instance = CSSCompression::getInstance('blue');
The compressor has an option function with multiple functionalities.
- If no arguments are passed in, the entire options array is returned.
- If a single name argument is passed, then the value of that key name in the options array is returned.
- If both a name and value are passed, then that value is set to it's corresponding key in the array.
// Returns entire options array $options = $CSSC->option(); // Returns the readability value $readability = $CSSC->option( 'readability' ); // Sets the readability to non-readable $CSSC->option( 'readability', CSSCompression::READ_NONE );
Alternatively, you can use direct access methods
// Direct access to options array $options = $CSSC->options; // Direct access to readability option value $readability = $CSSC->readability; // Direct setting of readability value $CSSC->readability = CSSCompression::READ_NONE;
Additionally, a reset function is provided to revert back to base options (decided at runtime).
// Resets options to original values $CSSC->reset();
The compressor class provides static integers that map to the internal readability values
CSSCompression::READ_MAX // Maximum Readability CSSCompression::READ_MED // Medium readability of output CSSCompression::READ_MIN // Minimal readability of output CSSCompression::READ_NONE // No readability of output (full compression into single line) // To set maximum readability (Assuming you have your own instance) $CSSC->option( 'readability', CSSCompression::READ_MAX ); // Or, just pass it in as another option $options = array( 'readability' => CSSCompression::READ_MAX, // Other options ... ); // Get full readability through express $compressed = CSSCompression::express( $css, $options );
Released: January 3, 2011
- pseduo-space, add space between pseduo selectors and comma/brace for ie6
- removing leading 0 of a decimal, 0.633px -> .633px
- handling all At Rules (charsets,media,imports,font-family,etc..)
- handling ms filter paths
- More css hacks support, including box-modal hack
- attr2selector, Convert id=blah and class=blah attributes to their selector counterparts
- strict-id, removes all selectors up to the last id
- add-unknown, adds unknown blocks to top of output in a comment
- Converted to subclass architecture, more modular.
- Using JSON based sandbox specs for focused unit tests.
- Helper conversion definitions(long2hex, hex2short) are now in JSON based files.
- Added benchmark/regression testing
January 3, 2011: css-compressor-3.0-full.zip
December 19, 2010: css-compressor-3.0beta.zip
December 19, 2010: css-compressor-3.0beta-full.zip
May 1, 2010: css-compressor-2.0.zip
September 5, 2009: css-compressor-1.0.zip
May 13, 2009: css-compressor-r8.zip
May 7, 2009: css-compressor-r6.zip
May 5, 2009: css-compressor-r5.zip
April 28, 2009: css-compressor-r4.zip