function compress_css()
{
// make these variables available locally
global $file_selector;
global $file_props;
// first, get the css that was sent, referenced or uploaded
$cssfile = get_sent_css();
// check if the user wants to see statistics
if ($_REQUEST['opt_output_stats']) {
// save the size of the code
$start_size = strlen($cssfile);
// save the current time
$start = explode(' ', microtime());
}
// check if no css was found
if (!$cssfile) {
// just die
exit("/* You didn't upload anything or the stylesheet is empty - Ro" . "bson */");
}
// temporarily change semicolons in web links
$cssfile = str_replace('://', '[!semi-colon!]//', $cssfile);
// remove html and css comments
kill_comments($cssfile);
// trim whitespace from the start and end
$cssfile = trim($cssfile);
// turn all rgb values into hex
if ($_REQUEST['opt_rgb2hex']) {
rgb2hex($cssfile);
}
// shorten colours
if ($_REQUEST['opt_colours2hex']) {
long_colours_to_short_hex($cssfile);
}
if ($_REQUEST['opt_hex2colours']) {
long_hex_to_short_colours($cssfile);
}
// remove any extra measurements that aren't needed
if ($_REQUEST['opt_remove_zeros']) {
remove_zero_measurements($cssfile);
}
// seperate into selectors and properties
sort_css($cssfile);
// change font weight text into numbers
if ($_REQUEST['opt_text_weights_to_numbers']) {
font_weight_text_to_numbers($cssfile);
}
// check if any selectors are used twice and combine the properties
if ($_REQUEST['opt_combine_identical_selectors']) {
combine_identical_selectors();
}
// remove any properties which are declared twice in one rule
if ($_REQUEST['opt_remove_overwritten_properties']) {
remove_overwritten_properties();
}
// check if properties should be combined
if ($_REQUEST['opt_combine_props_list']) {
// for each rule in the file
for ($n = 0; $n < count($file_props); $n++) {
// attempt to combine the different parts
combine_props_list($file_props[$n]);
}
}
// for each rule in the file
for ($n = 0; $n < count($file_props); $n++) {
// run all the individual functions to reduce their size
array_walk($file_props[$n], 'reduce_prop');
}
// remove all the properties that were blanked out earlier
remove_empty_rules();
// check if any rules are the same as other ones and remove the first ones
if ($_REQUEST['opt_combine_identical_rules']) {
combine_identical_rules();
}
// one final run through to remove all unnecessary parts of the arrays
remove_empty_rules();
$output = create_output();
// turn back colons
$output = str_replace('[!semi-colon!]//', '://', $output);
$output = stripslashes($output);
// check if the user wants to view stats
if ($_REQUEST['opt_output_stats']) {
echo '<h1>Statistics</h1><ul>';
echo '<li>Original size: ' . round($start_size / 1024, 2) . ' kB (' . number_format($start_size) . ' B)</li>';
echo '<li>Final size: ' . round(strlen(strip_tags($output)) / 1024, 2) . ' kB (' . number_format(strlen(strip_tags($output))) . ' B)</li>';
echo '<li>Saved: ' . round(($start_size - strlen(strip_tags($output))) / 1024, 2) . ' kB (' . number_format($start_size - strlen(strip_tags($output))) . ' B)</li>';
echo '<li>Reduction: ' . round(100 - strlen(strip_tags($output)) / $start_size * 100, 2) . '%</li>';
echo '</ul>';
$finish = explode(' ', microtime());
// work out the differences between the times
$seconds = $finish[1] - $start[1];
$miliseconds = $finish[0] - $start[0];
$duration = round($seconds + $miliseconds, 5);
echo '<ul>';
echo '<li>Duration: ' . $duration . ' seconds</li>';
echo '</ul>';
echo '<ul>';
echo '<li>Rules: ' . count($file_selector) . '</li>';
for ($n = 0; $n < count($file_selector); $n++) {
$selectors += count($file_selector[$n]);
}
for ($n = 0; $n < count($file_props); $n++) {
$props += count($file_props[$n]);
}
echo '<li>Selectors: ' . $selectors . '</li>';
echo '<li>Properties: ' . $props . '</li>';
echo '</ul>';
echo '<h1>CSS</h1>';
}
if ($_REQUEST['upload_link']) {
$_REQUEST['upload_style'] = NULL;
if (!$_POST['upload_link']) {
$_POST = $_GET;
}
foreach ($_POST as $key => $value) {
if ($value) {
if (!$url) {
$url .= '?' . $key . '=' . $value;
} else {
$url .= '&' . $key . '=' . $value;
}
}
}
echo '<ul><li><a href="http://' . $_SERVER['HTTP_HOST'] . $_SERVER['PHP_SELF'] . $url . '">Link to this output</a>.</ul>';
}
echo $output;
}
function compress_css($cssfile)
{
// make these variables available locally
global $file_selector;
global $file_props;
global $cssCompressor;
// first, get the css that was sent, referenced or uploaded
// save the size of the code
$start_size = strlen($cssfile);
// save the current time
$start = explode(' ', microtime());
// temporarily change semicolons in web links
$cssfile = str_replace('://', '[!semi-colon!]//', $cssfile);
// remove html and css comments
kill_comments($cssfile);
// trim whitespace from the start and end
$cssfile = trim($cssfile);
// turn all rgb values into hex
if ($cssCompressor['opt_rgb2hex']) {
rgb2hex($cssfile);
}
// shorten colours
if ($cssCompressor['opt_colours2hex']) {
long_colours_to_short_hex($cssfile);
}
if ($cssCompressor['opt_hex2colours']) {
long_hex_to_short_colours($cssfile);
}
// remove any extra measurements that aren't needed
if ($cssCompressor['opt_remove_zeros']) {
remove_zero_measurements($cssfile);
}
// seperate into selectors and properties
sort_css($cssfile);
// change font weight text into numbers
if ($cssCompressor['opt_text_weights_to_numbers']) {
font_weight_text_to_numbers($cssfile);
}
// check if any selectors are used twice and combine the properties
if ($cssCompressor['opt_combine_identical_selectors']) {
combine_identical_selectors();
}
// remove any properties which are declared twice in one rule
if ($cssCompressor['opt_remove_overwritten_properties']) {
remove_overwritten_properties();
}
// check if properties should be combined
if ($cssCompressor['opt_combine_props_list']) {
// for each rule in the file
for ($n = 0; $n < count($file_props); $n++) {
// attempt to combine the different parts
combine_props_list($file_props[$n]);
}
}
// for each rule in the file
for ($n = 0; $n < count($file_props); $n++) {
// run all the individual functions to reduce their size
array_walk($file_props[$n], 'reduce_prop', $cssCompressor);
}
// remove all the properties that were blanked out earlier
remove_empty_rules();
// check if any rules are the same as other ones and remove the first ones
if ($cssCompressor['opt_combine_identical_rules']) {
combine_identical_rules();
}
// one final run through to remove all unnecessary parts of the arrays
remove_empty_rules();
$output = create_output();
// turn back colons
$output = str_replace('[!semi-colon!]//', '://', $output);
$output = stripslashes($output);
// gather statistics
$stats['original_size'] = round($start_size / 1024, 2) . ' kB';
$stats['final_size'] = round(strlen(strip_tags($output)) / 1024, 2) . ' kB';
$stats['reduction'] = round(100 - strlen(strip_tags($output)) / $start_size * 100, 2) . '%';
$finish = explode(' ', microtime());
// work out the differences between the times
$seconds = $finish[1] - $start[1];
$miliseconds = $finish[0] - $start[0];
$stats['duration'] = round($seconds + $miliseconds, 5);
$stats['num_rules'] = count($file_selector);
for ($n = 0; $n < count($file_selector); $n++) {
$stats['num_selectors'] += count($file_selector[$n]);
}
for ($n = 0; $n < count($file_props); $n++) {
$stats['num_props'] += count($file_props[$n]);
}
return array($output, $stats);
}
