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do_action( "hook_name" )apply_filters( "hook_name", "what_to_filter" ).Remember, this hook may occur in more than one file. Moreover, the hook's context may change from version to version.
| Line | Code |
|---|---|
| 277 | * |
| 278 | * The filter is evaluated under two contexts: 'image_resize', and 'edit_image', |
| 279 | * (when a JPEG image is saved to file). |
| 280 | * |
| 281 | * @since 2.5.0 |
| 282 | * |
| 283 | * @param int $quality Quality level between 0 (low) and 100 (high) of the JPEG. |
| 284 | * @param string $context Context of the filter. |
| 285 | */ |
| 286 | $quality = apply_filters( 'jpeg_quality', $quality, 'image_resize' ); |
| 287 | } |
| 288 | |
| 289 | if ( $quality < 0 || $quality > 100 ) { |
| 290 | $quality = $default_quality; |
| 291 | } |
| 292 | } |
| 293 | |
| 294 | // Allow 0, but squash to 1 due to identical images in GD, and for backward compatibility. |
| 295 | if ( 0 === $quality ) { |