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>