WP_Image_Editor::set_quality( int $quality = null ): true|WP_Error
Sets Image Compression quality on a 1-100% scale.
Contents
Parameters
-
$quality
int Optional -
Compression Quality. Range: [1,100]
Default:
null
Return
true|WP_Error True if set successfully; WP_Error on failure.
More Information
Default quality defined in WP_Image_Editor class is 90.
Source
File: wp-includes/class-wp-image-editor.php
.
View all references
public function set_quality( $quality = null ) {
// Use the output mime type if present. If not, fall back to the input/initial mime type.
$mime_type = ! empty( $this->output_mime_type ) ? $this->output_mime_type : $this->mime_type;
// Get the default quality setting for the mime type.
$default_quality = $this->get_default_quality( $mime_type );
if ( null === $quality ) {
/**
* Filters the default image compression quality setting.
*
* Applies only during initial editor instantiation, or when set_quality() is run
* manually without the `$quality` argument.
*
* The WP_Image_Editor::set_quality() method has priority over the filter.
*
* @since 3.5.0
*
* @param int $quality Quality level between 1 (low) and 100 (high).
* @param string $mime_type Image mime type.
*/
$quality = apply_filters( 'wp_editor_set_quality', $default_quality, $mime_type );
if ( 'image/jpeg' === $mime_type ) {
/**
* Filters the JPEG compression quality for backward-compatibility.
*
* Applies only during initial editor instantiation, or when set_quality() is run
* manually without the `$quality` argument.
*
* The WP_Image_Editor::set_quality() method has priority over the filter.
*
* The filter is evaluated under two contexts: 'image_resize', and 'edit_image',
* (when a JPEG image is saved to file).
*
* @since 2.5.0
*
* @param int $quality Quality level between 0 (low) and 100 (high) of the JPEG.
* @param string $context Context of the filter.
*/
$quality = apply_filters( 'jpeg_quality', $quality, 'image_resize' );
}
if ( $quality < 0 || $quality > 100 ) {
$quality = $default_quality;
}
}
// Allow 0, but squash to 1 due to identical images in GD, and for backward compatibility.
if ( 0 === $quality ) {
$quality = 1;
}
if ( ( $quality >= 1 ) && ( $quality <= 100 ) ) {
$this->quality = $quality;
return true;
} else {
return new WP_Error( 'invalid_image_quality', __( 'Attempted to set image quality outside of the range [1,100].' ) );
}
}
Hooks
-
apply_filters( 'jpeg_quality',
int $quality ,string $context ) -
Filters the JPEG compression quality for backward-compatibility.
-
apply_filters( 'wp_editor_set_quality',
int $quality ,string $mime_type ) -
Filters the default image compression quality setting.
Changelog
Version | Description |
---|---|
3.5.0 | Introduced. |