PHP - Read For Learn

List of all theme customizer control types?

Have a look in the source: http://core.trac.wordpress.org/browser/trunk/wp-includes/class-wp-customize-control.php Basic control types: text checkbox radio select dropdown-pages Also some advanced control types (as-described by Otto): WP_Customize_Color_Control – extends the built in WP_Customize_Control class. It adds the color wheel jazz to places where color selection is needed. WP_Customize_Upload_Control – This gives you an upload box, for allowing file … Read more

WordPress Warning: preg_replace(): JIT compilation failed: no more memory

I added the following line to the php.ini and restarted Apache and it worked (Xampp on macOS): pcre.jit=0 This disables PCRE’s just-in-time compilation. Further information: http://php.net/manual/en/pcre.configuration.php#ini.pcre.jit If you can’t find the location of php.ini and are using Xampp, go to localhost and select the PHP information link and it is displayed there.

Is it safe to use $_SERVER[‘REQUEST_URI’]?

$_SERVER[‘REQUEST_URI’] will not be empty in WordPress, because it is filled in wp_fix_server_vars() (file wp-includes/load.php). This function is called in wp-settings.php before any plugin is loaded. So you can use it. But always escape the value. It is global and can be changed by any other code, so you cannot trust its value. A different … Read more

Include a external PHP file into a WordPress Custom Template

No, you cannot include PHP files in a theme the way you indicated. To see why, all we have to do is exercise some common sense and basic critical thinking: You would be doing a remote request to a remote server include cannot do this If by some miracle it worked, you would have a … Read more

Where to get information about array fields in $_REQUEST?

This is mostly pure PHP, but it does have WordPress twist. PHP has number of superglobal variables, that contain information relevant to current request. Out of those: $_GET contains info from URL (HTTP GET request) $_POST info from form submission (HTTP POST request) $_COOKIES about cookies set and $_REQUEST is combination of the above (according … Read more

Menu Items Disappearing

The following has worked for some users with similar problem: Try to increase the value of the max_input_vars variable in php.ini. This variable was introduced in PHP version 5.3.9 and has the default value of 1000. You can read more about it in the PHP documentation: http://php.net/manual/en/info.configuration.php max_input_vars 1000 PHP_INI_PERDIR Available since PHP 5.3.9. How … Read more

Proper use of Output Buffer

No, you don’t need output buffering in this case. As a rule of thumb: Don’t use output buffering unless you really have to. Just imagine what happens if someone else uses output buffering too from a plugin and it crosses with yours: // plugin ob_start(); // later, you in your theme ob_start(); // you call … Read more

Hide main div if wp_nav_menu is empty

Assign the menu to a string: $menu = wp_nav_menu( array ( ‘echo’ => FALSE, ‘fallback_cb’ => ‘__return_false’ ) ); if ( ! empty ( $menu ) ) { echo ‘<div class=”navmain2″>’ . $menu . ‘</div>’; }

How to stop jQuery.migrate manually

jQuery Migrate is nothing but a dependency of the jQuery script in WordPress, so one can simply remove that dependency. The code for that is pretty straightforward: function dequeue_jquery_migrate( $scripts ) { if ( ! is_admin() && ! empty( $scripts->registered[‘jquery’] ) ) { $scripts->registered[‘jquery’]->deps = array_diff( $scripts->registered[‘jquery’]->deps, [ ‘jquery-migrate’ ] ); } } add_action( ‘wp_default_scripts’, … Read more

Does an activated plugin automatically mean its methods are available to other WP functions?

Technically, it is possible. But I would use a slightly different approach. If your second plugin is loaded first you get an error. If you want to replace the class in another plugin, it is hard to do this. So hook into plugins_loaded with a specific priority to create the object and use the object … Read more

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