Ticket #44992: 44992.patch

wp-admin/includes/class-wp-screen.php

@@ -1187 +1187 @@
                 <legend><?php _e( 'Pagination' ); ?></legend>
                         <?php if ( $per_page_label ) : ?>
                                 <label for="<?php echo esc_attr( $option ); ?>"><?php echo $per_page_label; ?></label>
-                                <input type="number" step="1" min="1" max="999" class="screen-per-page" name="wp_screen_options[value]"
+                                <?php
+                                /**
+                                 * Filters a screen option per page max value for html validation.
+                                 *
+                                 * Returning value to set as max allowed value for html validation
+                                 * of `Number of items per page` input field.
+                                 *
+                                 * @since 4.9.9
+                                 *
+                                 * @param int $max_value The value per page max value using for
+                                 * HTML validation.
+                                 */
+                                $max_value = apply_filters( 'screen_per_page_max_value', 999 );
+
+                                // to not allow user to set more than the default value.
+                                if ( empty( $max_value ) || $max_value < 0 || $max_value > 999 ) {
+                                        $max_value = 999;
+                                }
+
+                                ?>
+                                <input type="number" step="1" min="1" max="<?php echo esc_attr( $max_value ); ?>" class="screen-per-page" name="wp_screen_options[value]"
                                         id="<?php echo esc_attr( $option ); ?>" maxlength="3"
                                         value="<?php echo esc_attr( $per_page ); ?>" />
                         <?php endif; ?>

wp-admin/includes/misc.php

@@ -630 +630 @@
                         case 'themes_network_per_page':
                         case 'site_themes_network_per_page':
                                 $value = (int) $value;
-                                if ( $value < 1 || $value > 999 ) {
+
+                                /**
+                                 * Filters a screen option per page value before it is set.
+                                 *
+                                 * The filter can also be used to restrict user to set max value
+                                 * of `Number of items per page`.
+                                 *
+                                 * Returning value to set as `Number of items per page`.
+                                 *
+                                 * @since 4.9.9
+                                 *
+                                 * @param int $value The number of rows to use.
+                                 */
+                                $value = apply_filters( 'set_screen_option_per_page', $value );
+
+                                if ( empty( $value ) || $value < 1 || $value > 999 ) {
                                         return;
                                 }
                                 break;