vt_resize

function vt_resize( $attach_id = null, $img_url = null, $width, $height, $crop = false ) {  // this is an attachment, so we have the ID

if ( $attach_id ) {

$image_src = wp_get_attachment_image_src( $attach_id, 'full' );

$file_path = get_attached_file( $attach_id );

// this is not an attachment, let's use the image url

} else if ( $img_url ) {

$file_path = parse_url( $img_url );

$file_path = ltrim( $file_path['path'], '/' );

//$file_path = rtrim( ABSPATH, '/' ).$file_path['path'];

$orig_size = getimagesize( $file_path );

$image_src[0] = $img_url;

$image_src[1] = $orig_size[0];

$image_src[2] = $orig_size[1];

}

$file_info = pathinfo( $file_path );

$extension = '.'. $file_info['extension'];

// the image path without the extension

$no_ext_path = $file_info['dirname'].'/'.$file_info['filename'];

$cropped_img_path = $no_ext_path.'-'.$width.'x'.$height.$extension;

// checking if the file size is larger than the target size

// if it is smaller or the same size, stop right here and return

if ( $image_src[1] > $width || $image_src[2] > $height ) {

// the file is larger, check if the resized version already exists (for crop = true but will also work for crop = false if the sizes match)

if ( file_exists( $cropped_img_path ) ) {


$cropped_img_url = str_replace( basename( $image_src[0] ), basename( $cropped_img_path ), $image_src[0] );


$vt_image = array (

'url' => $cropped_img_url,

'width' => $width,

'height' => $height

);

return $vt_image;

}

// crop = false

if ( $crop == false ) {

// calculate the size proportionaly

$proportional_size = wp_constrain_dimensions( $image_src[1], $image_src[2], $width, $height );

$resized_img_path = $no_ext_path.'-'.$proportional_size[0].'x'.$proportional_size[1].$extension;

//$resized_img_path = $no_ext_path.'-'.$width.'x'.$height.$extension;

// checking if the file already exists

if ( file_exists( $resized_img_path ) ) {

$resized_img_url = str_replace( basename( $image_src[0] ), basename( $resized_img_path ), $image_src[0] );

$vt_image = array (

'url' => $resized_img_url,

'width' => $new_img_size[0],

'height' => $new_img_size[1]

);

return $vt_image;

}

}

// no cached files - let's finally resize it

$new_img_path = image_resize( $file_path, $width, $height, $crop );

$new_img_size = getimagesize( $new_img_path );

$new_img = str_replace( basename( $image_src[0] ), basename( $new_img_path ), $image_src[0] );

// resized output

$vt_image = array (

'url' => $new_img,

'width' => $new_img_size[0],

'height' => $new_img_size[1]

);

return $vt_image;

}

// default output - without resizing

$vt_image = array (

'url' => $image_src[0],

'width' => $image_src[1],

'height' => $image_src[2]
);

return $vt_image;}

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