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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.
This hook occurs 2 times in this file.
| Line | Code |
|---|---|
| 319 | if ( $this->do_concat ) { |
| 320 | /** |
| 321 | * Filters the script loader source. |
| 322 | * |
| 323 | * @since 2.2.0 |
| 324 | * |
| 325 | * @param string $src Script loader source path. |
| 326 | * @param string $handle Script handle. |
| 327 | */ |
| 328 | $srce = apply_filters( 'script_loader_src', $src, $handle ); |
| 329 | |
| 330 | if ( $this->in_default_dir( $srce ) && ( $before_handle || $after_handle || $translations ) ) { |
| 331 | $this->do_concat = false; |
| 332 | |
| 333 | // Have to print the so-far concatenated scripts right away to maintain the right order. |
| 334 | _print_scripts(); |
| 335 | $this->reset(); |
| 336 | } elseif ( $this->in_default_dir( $srce ) && ! $conditional ) { |
| 337 | $this->print_code .= $this->print_extra_script( $handle, false ); |
| Line | Code |
| 372 | if ( ! preg_match( '|^(https?:)?//|', $src ) && ! ( $this->content_url && 0 === strpos( $src, $this->content_url ) ) ) { |
| 373 | $src = $this->base_url . $src; |
| 374 | } |
| 375 | |
| 376 | if ( ! empty( $ver ) ) { |
| 377 | $src = add_query_arg( 'ver', $ver, $src ); |
| 378 | } |
| 379 | |
| 380 | /** This filter is documented in wp-includes/class.wp-scripts.php */ |
| 381 | $src = esc_url( apply_filters( 'script_loader_src', $src, $handle ) ); |
| 382 | |
| 383 | if ( ! $src ) { |
| 384 | return true; |
| 385 | } |
| 386 | |
| 387 | $tag = $translations . $cond_before . $before_handle; |
| 388 | $tag .= sprintf( "<script%s src='%s' id='%s-js'></script>\n", $this->type_attr, $src, esc_attr( $handle ) ); |
| 389 | $tag .= $after_handle . $cond_after; |
| 390 | |