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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 |
|---|---|
| 1115 | |
| 1116 | function wp_max_upload_size() { |
| 1117 | $u_bytes = wp_convert_hr_to_bytes( ini_get( 'upload_max_filesize' ) ); |
| 1118 | $p_bytes = wp_convert_hr_to_bytes( ini_get( 'post_max_size' ) ); |
| 1119 | $bytes = apply_filters( 'upload_size_limit', min($u_bytes, $p_bytes), $u_bytes, $p_bytes ); |
| 1120 | return $bytes; |
| 1121 | } |
| 1122 | |
| 1123 | function wp_import_upload_form( $action ) { |
| 1124 | $bytes = apply_filters( 'import_upload_size_limit', wp_max_upload_size() ); |
| 1125 | $size = wp_convert_bytes_to_hr( $bytes ); |
| 1126 | ?> |
| 1127 | <form enctype="multipart/form-data" id="import-upload-form" method="post" action="<?php echo attribute_escape($action) ?>"> |
| 1128 | <p> |
| 1129 | <?php wp_nonce_field('import-upload'); ?> |
| 1130 | <label for="upload"><?php _e( 'Choose a file from your computer:' ); ?></label> (<?php printf( __('Maximum size: %s' ), $size ); ?>) |
| 1131 | <input type="file" id="upload" name="import" size="25" /> |
| 1132 | <input type="hidden" name="action" value="save" /> |
| 1133 | <input type="hidden" name="max_file_size" value="<?php echo $bytes; ?>" /> |