the function do_settings_section($page) generate error "Allowed memory size of ... bytes exhausted"

Question

I'm creating a plugin to auto delete post/event. I created a WP settings page to manage the default settings for auto delete.

I followed each step to register_setting, add_settings_field and add_settings_section for the $callback function.

After that I call settings_fields, do_settings_sections and `submit_button' inside this $callback

My settings_fields must be a checkbox, so I use the wp checked function inside input to check data value stored into wp_options.

All display correctly without do_settings_sections use. As soon as use this function I get this error "memory size exhausted" and the html part replicates itself indefinitely.

Finally, the checked attribute is not registered

I can't find my mistake:

Add to menu :

function stm_addmenu_auto_delete_event() {
        add_menu_page(
            'Automatic deletion',
            'Automatic <br/> deletion',
            'manage_options',
            'manage-auto-delete-page',
            'auto_delete_settings_callback',
            'dashicons-fas fa-trash',
             21
        );
}
add_action( 'admin_menu', 'stm_addmenu_auto_delete_event','manage_options');

add settings to page:

function new_settings_auto_delete() {
       add_settings_section( 
          'default_auto_delete_section', 
          'Manage the automatic deletion of posts', 
          '',
          'manage-auto-delete-page' 
        
       );

       register_setting( 
          'manage-auto-delete-page',
          'default_auto_delete_field',
          array(
             'type' => 'string',
             'sanitize_callback' =>'sanitize_text_field',
             'default' => ''
          )
       );

       add_settings_field(  
          'default_auto_delete_field',
          'By default activate automatic deletion',
          'auto_delete_settings_callback',
          'manage-auto-delete-page',
          'default_auto_delete_section'
       );
}
add_action( 'admin_init', 'new_settings_auto_delete' ); 

the callback function :

<?php
function auto_delete_settings_callback(){
   $option_auto_delete = get_option('default_auto_delete_field');
        
?>
   <stmwrapper>
      <form action="options.php" method="post" id="stm_auto_delete_manager_form_style">
      <?php
      do_settings_sections('manage-auto-delete-page');
      ?>
      <div id="stm_auto_delete_manager_container">
         <property class="default_activation">
            <!--<span>By default activate automatic deletion</span>-->
            <?php settings_fields('manage-auto-delete-page'); ?>
            <input class="default_auto_deletion_toggle" type="checkbox" id="default_auto_deletion_toggle" name="default_auto_delete_field" value="" <?php checked( '1', $option_auto_delete); ?>>
            <label class="slider-btn" for="default_auto_deletion_toggle">
               <span class="off">Non</span>
               <span class="on">Oui</span>
            </label>
         </property> 
         <?php
         submit_button( 'Save' );
         ?>
     </div>
     </form>
   </stmwrapper>
<?php
}

Answer 1

You seem to be creating a recursive loop.

In stm_addmenu_auto_delete_event(), you register an admin page via add_menu_page() that has a callback of auto_delete_settings_callback:

function stm_addmenu_auto_delete_event() {
  add_menu_page(
    'Automatic deletion',
    'Automatic <br/> deletion',
    'manage_options',
    'manage-auto-delete-page',
    'auto_delete_settings_callback',

In new_settings_auto_delete you register a settings field with a callback of auto_delete_settings_callback:

function new_settings_auto_delete() {
  // …

  add_settings_field(  
    'default_auto_delete_field',
    'By default activate automatic deletion',
    'auto_delete_settings_callback',
    'manage-auto-delete-page',

Thus, when you navigate to the Automatic deletion page you registered in stm_addmenu_auto_delete_event():

1. auto_delete_settings_callback() is called.
2. In auto_delete_settings_callback(), do_settings_sections('manage-auto-delete-page'); is executed.
3. WordPress finds settings fields registered to 'manage-auto-delete-page'.
4. default_auto_delete_field is found, with a registered callback of auto_delete_settings_callback.
5. We loop back to step 1 recursively, until the server runs out of memory.

It seems you may have meant to register a different callback for either the add_menu_page() call or the add_settings_field() call.

Answer 2

Thanks to Wongjn for his advice.

I followed him and rearrange my scripts. I separated into two files my script, one part for the register and add_ functions and other part to display the setting information. (settings_field, do_settings_sections and submit button) .

Before I have renamed the callback to add_menu_page into "auto_delete_menu_page_callback". It was this callback that created the infinite loop. Of course I call functions after admin_menu add_action: include plugin_dir_path( __FILE__ ) . 'manage-shedule/functions.php'

So my callback functions looks like this (register and add_ functions remain unchanged) (into my_plugin/manage-shedule/functions.php):

 function auto_delete_settings_callback(){
    $get_option_auto_delete = esc_attr(get_option('default_auto_delete_field'));
    $is_checked_auto_delete = $get_option_auto_delete == 'on' ? 'checked="checked"' : '';
    echo '
        <input class="default_auto_deletion_toggle" type="checkbox" id="default_auto_deletion_toggle" name="default_auto_delete_field" value="on" '. $is_checked_auto_delete .' >
        <label class="slider_btn_auto_setting_page" for="default_auto_deletion_toggle">
            <span class="off">Non</span>
            <span class="on">Oui</span>
        </label>
    ';
}
function auto_delete_menu_page_callback() {
    include plugin_dir_path( __FILE__ ).'manage.php';
}

and manage.php (inside "manage-schedule" folder) :

<form action="options.php" method="post" id="stm_auto_delete_manager_form_style">
    
    <stmwrapper>

            <?php 
                settings_fields('manage_auto_delete_page');
                do_settings_sections('manage_auto_delete_page');    
            ?>
                
                <?php submit_button( 'Save' ); ?>

            
    </stmwrapper>
</form>