Listar archivos recursivamente y reducir tamaño de imágenes con Imagick

list_upload_dir-tt_lower_image_weight.php

<?php
// Listar archivos recursivamente y reducir tamaño de imágenes con Imagick
if( isset($_GET['list_upload_dir']) )
	add_action( "init", "list_upload_dir" );
function list_upload_dir(){
	$wud = wp_upload_dir();
	$iterator = new RecursiveIteratorIterator( new RecursiveDirectoryIterator( $wud['basedir'] ) );
	$i = 0;
	echo'<meta charset="UTF-8">';
	echo'<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.6/css/bootstrap.min.css" integrity="sha384-1q8mTJOASx8j1Au+a5WDVnPi2lkFfwwEAa8hDDdjZlpLegxhjVME1fgjWPGmkzs7" crossorigin="anonymous">';
	echo '<div style="padding:20px 10px;"><table class="table table-striped table-bordered"><thead>';
	foreach($iterator as $name=>$file){
		// if( $file->isDir() || !is_image($name) ) continue;
		if( $file->isDir() ) continue;
		$size = $file->getSize()/1024/1024;
		if( $size<0.1 ) continue;
		$i++;
		$result = tt_lower_image_weight($name, $name, 90, 0);
		$col = empty($result['error'])? 'green': 'red';
		?>
			<tr>
				<td valign="middle" style="font-size:12px; line-height:1; padding:3px; background:<?php echo $col; ?>; color:white;"><?php echo $i; ?></td>
				<td valign="middle" style="font-size:12px; line-height:1; padding:3px; background:<?php echo $col; ?>; color:white;"><?php echo $name; ?></td>
				<td valign="middle" style="font-size:12px; line-height:1; padding:3px; background:<?php echo $col; ?>; color:white;"><?php echo number_format($size, 2, '.', '').' MB'; ?></td>
				<td valign="middle" style="font-size:12px; line-height:1; padding:3px; background:<?php echo $col; ?>; color:white;"><?php echo empty($result['nsize'])? 'false': number_format($result['nsize'], 2, '.', '').' MB'; ?></td>
				<td valign="middle" style="font-size:12px; line-height:1; padding:3px; background:<?php echo $col; ?>; color:white;"><?php echo empty($result['type'])? 'false': $result['type']; ?></td>
			</tr>
		<?php
		// exit();
	}
	echo '</table></div>';
	exit();
}
// reducir tamaño de imágenes con Imagick
function tt_lower_image_weight($from, $to, $q=99, $save=true){
	if( !class_exists('Imagick') ) return false;
	$ret = array();
	$ret['error'] = false;
	/* Create the Imagick object */
	$im = new Imagick();
	try{
		if( $im->readImage($from) && $im->valid() ){
			$ret['type'] = $im->getImageMimeType();
			if( strpos($ret['type'], 'gif')===false ){
				$os = $im->getImageLength()/1024/1024;
				$im->setImageCompression(Imagick::COMPRESSION_JPEG);
				$im->setImageCompressionQuality($q);
				$im->stripImage();
				$ret['nsize'] = strlen( $im->getImageBlob() )/1024/1024;
				if( $save && $os>$ret['nsize'] ){
					$ret['saved'] = $im->writeImage( $to );
				}
			}else{
				$ret['error'] = 'is gif';
			}
		}else{
			$ret['error'] = 'not valid';
		}
	}catch(Exception $e){
		$ret['error'] = 'not valid';
	}
	$im->destroy();
	return $ret;
}
// is_image
function is_image($path){
	$a = getimagesize($path);
	$image_type = $a[2];
	// IMAGETYPE_GIF
	if( in_array($image_type , array(IMAGETYPE_JPEG ,IMAGETYPE_PNG , IMAGETYPE_BMP)) ){
		return true;
	}
	return false;
}