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The best way to understand what a hook does is to look at where it occurs in the source code.
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 |
|---|---|
| 1861 | /** |
| 1862 | * Filters an img tag within the content for a given context. |
| 1863 | * |
| 1864 | * @since 6.0.0 |
| 1865 | * |
| 1866 | * @param string $filtered_image Full img tag with attributes that will replace the source img tag. |
| 1867 | * @param string $context Additional context, like the current filter name or the function name from where this was called. |
| 1868 | * @param int $attachment_id The image attachment ID. May be 0 in case the image is not an attachment. |
| 1869 | */ |
| 1870 | $filtered_image = apply_filters( 'wp_content_img_tag', $filtered_image, $context, $attachment_id ); |
| 1871 | |
| 1872 | if ( $filtered_image !== $match[0] ) { |
| 1873 | $content = str_replace( $match[0], $filtered_image, $content ); |
| 1874 | } |
| 1875 | |
| 1876 | /* |
| 1877 | * Unset image lookup to not run the same logic again unnecessarily if the same image tag is used more than |
| 1878 | * once in the same blob of content. |
| 1879 | */ |