I figured how to add an input value as a meta key value to a new post from a frontend post form (thanks to @thedeadmedic), but I can’t figure how to add two or more meta keys at once. Is this possible with the next code? These meta keys are named ‘location2′ and ‘price’, and the input fields are respectively ‘postLocation2′ and ‘postPrice’ (‘$safe_price’ after validation).
My code:
<?php
/*
* Plugin Name: Submit From Front
* Plugin URI:
* Description: This creates a form so that posts can be submitted from the front end.
* Version: 0.1
* Author:
* Author URI:
* Text Domain: submit-from-front
*/
class WPSE_Submit_From_Front {
const NONCE_VALUE = 'front_end_new_post';
const NONCE_FIELD = 'fenp_nonce';
protected $pluginPath;
protected $pluginUrl;
protected $errors = array();
protected $data = array();
function __construct() {
$this->pluginPath = plugin_dir_path( __file__ );
$this->pluginUrl = plugins_url( '', __file__ );
}
/**
* Shortcodes should return data, NOT echo it.
*
* @return string
*/
function shortcode() {
if ( ! current_user_can( 'publish_posts' ) )
return sprintf( '<p>Please <a href="%s">login</a> to post adverts.</p>', esc_url( wp_login_url( get_permalink() ) ) );
elseif ( $this->handleForm() )
return '<p class="success">Nice one, post created!</p>';
else
return $this->getForm();
}
/**
* Process the form and return true if post successfully created.
*
* @return bool
*/
function handleForm() {
if ( ! $this->isFormSubmitted() )
return false;
// http://php.net/manual/en/function.filter-input-array.php
$data = filter_input_array( INPUT_POST, array(
'postTitle' => FILTER_DEFAULT,
'postContent' => FILTER_DEFAULT,
'postCategory' => FILTER_DEFAULT,
'postLocation' => FILTER_DEFAULT,
'postLocation2' => FILTER_DEFAULT,
'postPrice' => FILTER_DEFAULT,
));
$data = wp_unslash( $data );
$data = array_map( 'trim', $data );
// You might also want to more aggressively sanitize these fields
// By default WordPress will handle it pretty well, based on the current user's "unfiltered_html" capability
$data['postTitle'] = sanitize_text_field( $data['postTitle'] );
$data['postContent'] = wp_check_invalid_utf8( $data['postContent'] );
$data['postCategory'] = sanitize_text_field( $data['postCategory'] );
$data['postLocation'] = sanitize_text_field( $data['postLocation'] );
$data['postLocation2'] = sanitize_text_field( $data['postLocation2'] );
$data['postPrice'] = sanitize_text_field( $data['postPrice'] );
// Validate the Price field input
$safe_price = intval( $data['postPrice'] );
if ( ! $safe_price ) {
$safe_price = '';
}
if ( strlen( $safe_price ) > 10 ) {
$safe_price = substr( $safe_price, 0, 10 );
}
$this->data = $data;
if ( ! $this->isNonceValid() )
$this->errors[] = 'Security check failed, please try again.';
if ( ! $data['postTitle'] )
$this->errors[] = 'Please enter a title.';
if ( ! $data['postContent'] )
$this->errors[] = 'Please enter the content.';
if ( ! $data['postCategory'] )
$this->errors[] = 'Please select a category.';
if ( ! $data['postLocation'] )
$this->errors[] = 'Please select a location.';
if ( ! $this->errors ) {
$post_id = wp_insert_post( array(
'post_title' => $data['postTitle'],
'post_content' => $data['postContent'],
'post_category' => array( $data['postCategory'] ),
'tax_input' => array('loc' => array( $data['postLocation'] )),
'post_status' => 'publish',
));
// This will add a meta key 'location2' to the post
// How to add a second (the $safe_price value) meta key named 'price'?
$post_id = add_post_meta($post_id, 'location2', $data['postLocation2']);
if ( ! $post_id )
$this->errors[] = 'Whoops, please try again.';
} else {
$post_id = 0;
}
return ( bool ) $post_id;
}
/**
* Use output buffering to *return* the form HTML, not echo it.
*
* @return string
*/
function getForm() {
ob_start();
?>
<div id ="frontpostform">
<?php foreach ( $this->errors as $error ) : ?>
<p class="error"><?php echo $error ?></p>
<?php endforeach ?>
<form id="formpost" method="post">
<fieldset>
<label for="postTitle">Post Title</label>
<input type="text" name="postTitle" id="postTitle" value="<?php
// "Sticky" field, will keep value from last POST if there were errors
if ( isset( $this->data['postTitle'] ) )
echo esc_attr( $this->data['postTitle'] );
?>" />
</fieldset>
<fieldset>
<label for="postContent">Content</label>
<textarea name="postContent" id="postContent" rows="10" cols="35" ><?php
if ( isset( $this->data['postContent'] ) )
echo esc_textarea( $this->data['postContent'] );
?></textarea>
</fieldset>
<!-- Category -->
<fieldset>
<label for="postCategory">Category</label>
<select name="postCategory">
<option value=""><?php echo esc_attr(__('Select Category')); ?></option>
<?php
$categories = get_categories( 'hide_empty=0' );
foreach ($categories as $category) {
// keep post category value from last POST if there were errors
if ( isset( $this->data['postCategory'] ) && $this->data['postCategory'] == $category->cat_ID ) {
$option = '<option value="' . $category->cat_ID . '" selected="selected">';
} else {
$option = '<option value="' . $category->cat_ID . '">';
}
$option .= $category->cat_name;
$option .= ' ('.$category->category_count.')';
$option .= '</option>';
echo $option;
}
?>
</select>
</fieldset>
<!-- Location -->
<fieldset>
<label for="postLocation">Location</label>
<select name="postLocation">
<option value=""><?php echo esc_attr(__('Select Location')); ?></option>
<?php
$categories = get_terms( 'loc', 'hide_empty=0' );
foreach ($categories as $category) {
if ( isset( $this->data['postLocation'] ) && $this->data['postLocation'] == $category->term_id ) {
$option = '<option value="' . $category->term_id . '" selected="selected">';
} else {
$option = '<option value="' . $category->term_id . '">';
}
$option .= $category->name;
$option .= ' ('.$category->count.')';
$option .= '</option>';
echo $option;
}
?>
</select>
</fieldset>
<!-- Second Location -->
<fieldset>
<label for="postLocation2">Location 2</label>
<input type="text" name="postLocation2" id="postLocation2" value="<?php
// "Sticky" field, will keep value from last POST if there were errors
if ( isset( $this->data['postLocation2'] ) )
echo esc_attr( $this->data['postLocation2'] );
?>" />
</fieldset>
<!-- Price -->
<fieldset>
<label for="postPrice">Price</label>
<input type="text" name="postPrice" id="postPrice" maxlength="10" value="<?php
// "Sticky" field, will keep value from last POST if there were errors
if ( isset( $this->data['postPrice'] ) )
echo esc_attr( $this->data['postPrice'] );
?>" />
</fieldset>
<fieldset>
<button type="submit" name="submitForm" >Create Post</button>
</fieldset>
<?php wp_nonce_field( self::NONCE_VALUE , self::NONCE_FIELD ) ?>
</form>
</div>
<?php
return ob_get_clean();
}
/**
* Has the form been submitted?
*
* @return bool
*/
function isFormSubmitted() {
return isset( $_POST['submitForm'] );
}
/**
* Is the nonce field valid?
*
* @return bool
*/
function isNonceValid() {
return isset( $_POST[ self::NONCE_FIELD ] ) && wp_verify_nonce( $_POST[ self::NONCE_FIELD ], self::NONCE_VALUE );
}
}
new WPSE_Submit_From_Front;
