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<?php
namespace common\components;
class HelpersFunctions
{
/**
* Compress image and save
*
* @param String $source_url
* @param String $destination_url
* @param int $quality
* @return void
*/
public static function compressImage($sourceUrl, $destUrl, $fileName, $quality, $pngquality=null)
{
$info = getimagesize($sourceUrl);
if ($info['mime'] == 'image/jpeg'){
$image = imagecreatefromjpeg($sourceUrl);
} elseif ($info['mime'] == 'image/gif') {
$image = imagecreatefromgif($sourceUrl);
} elseif ($info['mime'] == 'image/png') {
$image = imagecreatefrompng($sourceUrl);
imagealphablending($image, false);
imagesavealpha($image, true);
}
//if directory not exist create it
self::makedirs($destUrl);
$fullpath = $destUrl . DIRECTORY_SEPARATOR . $fileName;
if(!$quality) {
imagepng($image, $fullpath, $pngquality);
} else {
imagejpeg($image, $fullpath, $quality);
}
return $fullpath;
}
/**
* Create a directory if not exist
*/
public static function makedirs($path, $mode=0777) {
return is_dir($path) || mkdir($path, $mode, true);
}
/**
* Convert base64 to image
* @param string $base64_string with data meta
* @param string $output_file
* @return string output file name
*/
public static function base64ToImage($base64, $destUrl, $fileName) {
//if directory not exist create it
self::makedirs($destUrl);
$fullpath = $destUrl . DIRECTORY_SEPARATOR . $fileName;
// open the output file for writing
$ifp = fopen( $fullpath, 'wb' );
// split the string on commas
// $data[ 0 ] == "data:image/png;base64"
// $data[ 1 ] == <actual base64 string>
$data = explode( ',', $base64 );
// we could add validation here with ensuring count( $data ) > 1
if(count($data) > 1) {
fwrite( $ifp, base64_decode( $data[ 1 ] ) );
} else {
throw new \Exception('Incomplete base 64 with data meta');
}
// clean up the file resource
fclose( $ifp );
return $fullpath;
}
}