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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 |
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569 | ); |
570 | /** |
571 | * Filter the legacy (pre-3.5.0) media buttons. |
572 | * |
573 | * @since 2.5.0 |
574 | * @deprecated 3.5.0 Use 'media_buttons' action instead. |
575 | * |
576 | * @param string $string Media buttons context. Default empty. |
577 | */ |
578 | $legacy_filter = apply_filters( 'media_buttons_context', '' ); |
579 |
|
580 | if ( $legacy_filter ) { |
581 | // #WP22559. Close <a> if a plugin started by closing <a> to open their own <a> tag. |
582 | if ( 0 === stripos( trim( $legacy_filter ), '</a>' ) ) |
583 | $legacy_filter .= '</a>'; |
584 | echo $legacy_filter; |
585 | } |
586 | } |
587 |
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