Questions tagged [sanitization]

Sanitization means clearing data (often: user input) of unwanted input. This is done to prevent errors or security problems like injection of malicious code into the database. WP offers over a large number of sanitization functions to make data safe for further usage.

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Visual Composer: Backend param value sanitation

Is there a way to sanitize the value saved from an element param in the visual composer? I have a custom param that ends up having a JSON value. I want to transform that JSON into a PHP array on save....
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array_map() for sanitizing $_POST

I am working on an options panel for a plugin. And have an array being posted and updated to the options table. I am using the array_map() function to iterate over the array with sanitize_text_fields()...
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Sanitize $_GET variable when comparing

I know when I want to save data in database, I must sanitize data but what about following case which is a simple comparison. Should I sanitize? if ( ! isset( $_GET['page'] ) ) { return; } ...
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Customizer textarea with script tag won't work in live preview

I have a simple textarea setup in the customizer that I want to use for including a 3rd party form. In order to embed this form I need to paste in 2 script tags into the textarea. I have an IF in ...
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19 views

Does meta-data need to be sanitized?

Is it necessary to escape data when storing it in the user's meta-data? I'm not sure if WP does this automatically, or if it is even necessary. Also, if it is necessary, should I use ...
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Data Validation & Sanitization for Big HTML Blocks

I'm developing a theme for Envato. Got Soft Reject because of issue typed in the question title. I created a 4 column widget area for my theme's footer. How can I sanitize the $output variable? Thank ...
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25 views

do I need to sanitize a shortcode's function input?

I'm using the following custom plugin to count the number of members in the MemberPress database: function display_member_count( $atts ) { global $wpdb; $sql = "SELECT COUNT(`meta_key`) as ...
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32 views

Where is the HTML-handler part in the wpdb class?

I'm trying to understand how datas are being handled when saving to the database in the wpdb class. I have searched for where HTML string datas are handled and found a method in the $this->query() ...
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Custom Customizer Image Sanitize fails to update image

I use this custom sanitizer to get the appropriate image size so that anyone using my themes can't mess up and put an 8k image in the website. The code works, but the problem I have is that once the ...
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38 views

I need to get the control choices to sanitize_callback

Code Currently, I'm working project to automatically generate all my theme customizer options with simple array. 'nav_font_style' => array( 'default_options' => array( 1 ...
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37 views

HTML in category name

how can edit taxonomy.php in order to stop term sanitizing? I need HTML (font color) in category name. Thanks!
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WP_Customize_Manager: How to get control ID

I have this buggy sanitization function for "select" control: function sanitize_select( $input, $setting ) { $input = sanitize_key( $input ); $control = $setting->manager->get_control( $...
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textarea field is getting escaped for some unknown reason

It doesn't happen outside of WordPress, so I'm posting here. I'm using a textarea field in a custom form, and before I have a chance to do anything with it, I find it's escaped: echo $_POST['...
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Coding a plugin on WordPress; when should I sanitize? [duplicate]

I am developing a custom plugin on WordPress for a client. Just a simple question: when I am using update_post_meta() and update_user_meta(), do I need to use the WordPress sanitization functions? I ...
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359 views

Sanitize and data validation with apply_filters() function

Should we sanitize and validate the apply_filters() like the examples below? absint( apply_filters( 'slug_excerpt_length', 35 ) ); wp_kses_post( apply_filters( 'slug_excerpt_more', '…' ) );...
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Must I serialize/sanitize/escape array data before using set_transient?

Everything is in the question. For a notices system to show warnings/errors in the admin, I´m using transient. When I published my first plugin, I received an email to ask me to sanitize/validate/...
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167 views

How to get input_attrs in the sanitize function?

When I try to get input_attrs in the sanitize function I have always errors like: Trying to get property of non-object in ... How to do it ? Thanks in advance. Control class: class ...
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70 views

Modify automatically generation of slug when term is created

I need modify the sanitize of slug when a term is created. For example I'm creating a term with name 0,5 and the slug automatically generated is 05. I need to add a dash in the position of the comma, ...
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Is wp_kses the right approach in sanitizing this string?

I have a function that trims my post title and I escape the final output using wp_kses. Is this the right approach? function theTrimmedPostTitle( $length = BIG_INT, $delimiter = '' ) { $title = ...
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62 views

What's a safe / good way to output HTML safely within WordPress templates?

Assume I have a function that returns HTML output after it's done processing it: function parse_html_for_images() { return '<img src="' . thumbnail_url() . '">'; } I need to output this ...
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255 views

Sanitizing `wp_editor();` Values for Database, Edit, and Display

I'm using custom instances of wp_editor(); to allow rich text editing of Post Meta associated with a Post Object. I'd like to perform much of the same sanitization that occurs with post_content for ...
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373 views

Why does wp_redirect strip out %0A (url encoded new line character) and how do I make it stop?

Does this have something to do with sanitization? I need to pass a string as a URL parameter, and that string has \n characters in it. When the URL gets to the client, all other encoding is there (...
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221 views

How to sanitize my cookie name

guys! I'm setting a cookie after my Gravity Form is submitted. The name is based on the current page, so each page that has this form will have its own cookie. Some pages with urls ending such as /...
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145 views

WordPress Settings API - Sanitize Integer

I am sanitizing a text field input via a custom WordPress Setting API page like this... public function current_issue_sanitize($input) { $sanitary_values = array(); if ( isset( $input['...
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146 views

Shortcode putting html such as <img>

$atts = shortcode_atts( array( 'path' => 'https://s.w.org/about/images/logos/wordpress-logo-simplified-rgb.png' ), $atts); The above is a part of the shortcode. In Wordpress text ...
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2k views

How to allow HTML tags into WP Bakery (formerly Visual Composer) `textfield` parameter

While writing a custom element for WC Bakery (formerly Visual Composer) I've discovered that the HTML tags are being stripped from the textfield parameter type. It's sanitizing the textfield value by ...
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123 views

How can I apply custom sanitization to new usernames?

I have a WooCommerce module creating Wordpress usernames on my behalf. I want to make sure those usernames are sanitized according to my rules, which are stricter than the Wordpress requirements. How ...
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122 views

How WordPress sanitizes post content on save? Or it doesn't?

Does WordPress apply any kind of data sanitization for its post content when saving it from admin area? (like stripping <script> tags) Or all it does is checks for some user capability (like ...
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284 views

How do I sanitize the str_replace function in javascript variables

I have the following code in the javascript which outputs the date(s). With backslash for that, I'm replacing those strings with the str_replace to remove backslash, but I can't sanitize that using ...
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47 views

Form Sanitization and Validation

Already asked this on Code Review but no answer there so that's why i'm trying here. I'm kinda new to form sanitization and validation. If someone could look at my code and tell me where i could do ...
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1answer
485 views

How to use esc_attr__() function properly to translate a variable that contains string?

I am trying to develop a theme and trying to escape a string using esc_attr__() fuction. Here is how I implemented it. $title = stoic_get_the_site_title(); echo esc_attr__($title, 'stoic'); But ...
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426 views

function sanitize_title() does not appear to be working

Spent quite a while trying to figure this out. I've implemented a stop-gap function that mimics what I believe this function is supposed to be doing, but I would like to use the native libs/functions ...
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76 views

where to apply “apply filters” and other Sanitization Functions

I got to learn something new today here on this post. I have code written for a Post widget → <?php class chimp_post_widget extends WP_Widget { function __construct() { ...
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2answers
81 views

Data not displaying in text field

I have been working on trying to get data to store and display on a CPT field. The code I have is here: function fhaac_subject_box_callback( $post ){ wp_nonce_field( basename(__FILE__ ), '...
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47 views

Preserve old values on error in setting API

I am trying to preserve old value of form when it fails the validation defined in sanitize callback of register_setting. But it does not do so, instead it save the default values register_setting('...
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47 views

Can i use the same sanitize function on multiple theme mod textboxes?

I have a theme mod with multiple options and currently adding sanitizing options to those choices. This is my code I'm using: $wp_customize->add_section( 'twsa_feed' , array( 'title' => ...
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2k views

Default WordPress taxonomy (Tag) - How to add a custom field to form and save it to the database

This adds the field to the add new tag form function tag_add_form_fields ( $taxonomy ){ ?> <div class="form-field term-colorpicker-wrap"> <label for="term-colorpicker">...
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82 views

Seeking clarity on data sanitization fields for settings textarea

Wanting to learn more about the settings page I wanted to be able to add code such as Google Adsense, Google Analytics and anything code related in a textarea within a custom settings page but I've ...
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26 views

Can we validate data from jquery

Is it ok, to validate some data using jquery? I am working on a plugin which has repeater fields in widgets, so my plan was to convert all repeater field data in json when user clicks on save button. ...
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92 views

What functions does WordPress use for filtering / sanitizing comments?

We have some custom built comments (ones tied to custom post types, that we can't integrate with WP's comment system). But we want to filter the comments when they are submitted the way WP does and ...
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3k views

Sanitize content from wp_editor

I built a custom post type where we can find a standard textarea/tinymce generated by wp_editor() and I'm facing an issue for the saving part. If I save the content with the following code : ...
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192 views

Customizer: Category Select Sanitize

as a noob I managed out to create a custom selectbox control for categories in customizer. But now I am trying to find a clever 'sanitize_callback' function in order to ensure security. Here is my ...
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1answer
560 views

Escape hexadecimals/rgba values

I know that sanitize_hex_color exists for sanitizing hexadecimal values going into the database (and only exists in the Customizer), but what's the best function to escape those same values. Should I ...
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128 views

Escaping and sanitizing SVGs in metabox textarea

I want to include inline SVGs in a metabox textarea. That's easy. What's killing me is how do I sanitize the textarea before saving the postmeta, and how do I escape it? Halp? Thanks!
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90 views

Prevent invalid or empty values from being saved to the database and retain the form field values upon error

I'm using the Settings API to save the settings of my plugin. I want a positive integer value from the settings field. register_setting( $option_group, $option_name . '_number', '...
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1answer
437 views

Should nonce be sanitized?

The general guideline is that we should sanitize all user input before using them. Now my questions is whether this applies to nonce or not. Which one is correct? wp_verify_nonce( ...
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30 views

data (html) migration to posts

Thank you, up front for taking the time to look into my problem. I have around 605 posts I extracted from a database of a site that was running on ruby on rails. I converted the data into JSON which ...
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1answer
62 views

Who is responsible for data sanitization in WordPress development?

I am studying how to write more secure WordPress code by implementing validation, sanitization and data escaping wherever necessary. Validation and escaping makes perfect sense, but I am a little ...
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130 views

Is it sensible to worry about sanitizing admin input in plugin custom CSS?

In numerous plugins and themes, developers will provide an option for Admin-level users to enter their own additional CSS (for the sake, obviously, of customizing output). Some plugins and themes also ...
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2answers
484 views

Best Practice for Validating and Sanitizing Data

I developed a plugin which processes data following user input into a number of forms on the front end. The field types within the forms and the data input varies significantly. To process the data, ...