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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 |
|---|---|
| 106 | if ( $this->do_concat ) { |
| 107 | /** |
| 108 | * Filter the script loader source. |
| 109 | * |
| 110 | * @since 2.2.0 |
| 111 | * |
| 112 | * @param string $src Script loader source path. |
| 113 | * @param string $handle Script handle. |
| 114 | */ |
| 115 | $srce = apply_filters( 'script_loader_src', $src, $handle ); |
| 116 | if ( $this->in_default_dir($srce) ) { |
| 117 | $this->print_code .= $this->print_extra_script( $handle, false ); |
| 118 | $this->concat .= "$handle,"; |
| 119 | $this->concat_version .= "$handle$ver"; |
| 120 | return true; |
| 121 | } else { |
| 122 | $this->ext_handles .= "$handle,"; |
| 123 | $this->ext_version .= "$handle$ver"; |
| 124 | } |
| Line | Code |
| 127 | $this->print_extra_script( $handle ); |
| 128 | if ( !preg_match('|^(https?:)?//|', $src) && ! ( $this->content_url && 0 === strpos($src, $this->content_url) ) ) { |
| 129 | $src = $this->base_url . $src; |
| 130 | } |
| 131 | |
| 132 | if ( !empty($ver) ) |
| 133 | $src = add_query_arg('ver', $ver, $src); |
| 134 | |
| 135 | /** This filter is documented in wp-includes/class.wp-scripts.php */ |
| 136 | $src = esc_url( apply_filters( 'script_loader_src', $src, $handle ) ); |
| 137 | |
| 138 | if ( ! $src ) |
| 139 | return true; |
| 140 | |
| 141 | if ( $this->do_concat ) |
| 142 | $this->print_html .= "<script type='text/javascript' src='$src'></script>\n"; |
| 143 | else |
| 144 | echo "<script type='text/javascript' src='$src'></script>\n"; |
| 145 | |