So, I’ve been pulling my hair out over this for longer than I’d care to admit. I am trying to create a bunch of checkboxes in profile.php and user-edit.php for a plugin that is populated by an array. For starters, this works:
//<!-- "HTML" -->
function profile_fields($user) {
$user_id = $user->ID;
<input type='hidden' name="user_id" value="<?php echo $user_id ?>" />
<input type="checkbox" id="some-setting" name='some-setting'
<?php if (get_user_meta( $user->ID, 'somePref', true ) == '1'){ echo 'checked'; } ?> />
<label for="some-setting">TEST 2</label>
//PHP
function update_field_value($user_id) {
if ( isset($_POST['some-settings'], $user_id ) && $_POST['some-settings'] == 'on') {
update_user_meta( $user_id, 'somePref', '1');
} else {
update_user_meta( $user_id, 'somePref', NULL);
}
}
HOWEVER, what I have generates Undefined offset... and Trying to access array offset on value of type null... that I can’t trace the origin of when using:
class Some_Class
{
//Array of user specialties to be displayed
var $userSpecialtiesList;
//Array of ids for input fields
var $userSpecialtiesIDs = array();
//Array of meta values for input fields
var $metaValues = array();
//Array of meta value names for use with accessing info
var $metaNames = array();
/**
* initialize
*
* I use this to populate the array and call add_action
*/
function initialize(){
$this->userSpecialtiesList = array(
/* some information here */
);
add_action( 'show_user_profile', array($this, 'extra_profile_fields') );
add_action( 'edit_user_profile', array($this, 'extra_profile_fields') );
add_action( 'personal_options_update', array($this, 'update_field_value') );
add_action( 'edit_user_profile_update', array($this, 'update_field_value') );
}
/**
* extra_profile_fields
* I use this to generate the input fields that the user sees
*/
function extra_profile_fields( $user ) {
$user_id = $user->ID;
//I used this for testing
//$meta_value = get_user_meta( $user->ID, 'somePref', true );
?>
<h3><?php _e("Some Title", "blank"); ?></h3>
<table class="form-table">
<!-- Some unrelated stuff here -->
<tr>
<th><h4><?php _e("Specialties"); ?></h4></th>
<td>
<fieldset>
<!-- Some more unrelated stuff here -->
<?php
$this->generateCheckboxes($user_id);?>
</fieldset>
</td>
</tr>
</table>
<?php
}
/**
* generateID
*
* Partially complete function to generate field ids and meta keys
*/
function generateID($phrase, $arrValue, $style){
//Remove illiegal characters and leave only alphanumeric
$arrValueUpdated = preg_replace('/[^a-zA-Zd:]/', "", $arrValue);
switch($style){
//Use Dashes
case $style == "-":
case $style == "dash":
return strtolower($phrase) . "-" . strtolower($arrValueUpdated);
//Use camelCase
case $style == "camelCase":
return strtolower($phrase) . ucfirst($arrValueUpdated);
//Default is alltogether
default:
return strtolower($phrase) . strtolower($arrValueUpdated);
}
}
/**
* generateCheckboxes
*
* I use this to generate checkboxes from the array instantiated above
*/
function generateCheckboxes($userID){
foreach($this->userSpecialtiesList as $userSpecialty){
//Create unique id for input fields and add it to array for later
$inputID = $this->myGenerateID("specialty", $userSpecialty, "dash");
array_push( $this->userSpecialtiesIDs, $inputID );
//Create meta key and add it to array of meta keys for use with update_user_meta later
$metaName = $this->myGenerateID("pref", $userSpecialty, "camelCase");
array_push( $this->metaNames, $metaName );
//Create variable for meta values and add it to array for later
$meta_value = get_user_meta( $userID, $metaName, true );
array_push( $this->metaValues, $meta_value );
?>
<div class="my-checkbox-class">
<input type='hidden' name="user_id" value="<?php echo $userID ?>" />
<input type="checkbox" id="<?php echo $inputID; ?>" name='<?php echo $inputID; ?>'
<?php if ($meta_value == '1'){ echo 'checked'; } ?> />
<label for='<?php echo $inputID; ?>'><?php _e($userSpecialty); ?></label>
</div>
<?php }
function update_field_value($user_id) {
$user_id = $_POST['user_id'];
$uslIndex = 0;
foreach($this->userSpecialtiesList as $userSpecialty){
if ( isset($_POST[$this->userSpecialtiesIDs[$uslIndex]], $user_id ) && $_POST[$this->userSpecialtiesIDs[$uslIndex]] == 'on') {
update_user_meta( $user_id, $this->metaNames[$uslIndex], '1');
} else {
update_user_meta( $user_id, $this->metaNames[$uslIndex], NULL);
}
$uslIndex++;
}
}
}
function some_class_func() {
global $some_class_func;
// Instantiate only once.
if( !isset($some_class_func) ) {
$some_class_func = new Some_Class();
$some_class_func->initialize();
}
return $some_class_func;
}
// Instantiate
some_class_func();
In posting this, I obfuscated some of the variable names and removed some unnecessary bits for clarity; I also realize as I went through it that I have some artifacts from re-writing portions of it that may be part of my problem but I’ve chosen to leave them in.
If I get this on my own then I will post the solution for everyone; in any case though, I offer many thanks in advance for any and all answers / help!
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Answer
Alright, so it seems like my problem was perhaps one of scope so what I did was basically just create an array elsewhere and hand it to the update function. So, I pretty much left initialize(), extra_profile_fields(), and generateID() alone and instead I made the following changes:
//Generate the input tag ID and meta key / name
// and then create the HTML for checkboxes
function generateCheckboxes($userID){
foreach($this->userSpecialtiesList as $userSpecialty){
$inputID = $this->generateID("specialty", $userSpecialty, "dash");
$metaName = $this->generateID("pref", $userSpecialty, "camelCase"); ?>
<div class="prof-checkbox">
<input type='hidden' name="user_id" value="<?php echo $userID ?>" />
<input type="checkbox" id="<?php echo $inputID; ?>" name='<?php echo $inputID; ?>'
<?php if (get_user_meta( $userID, $metaName, true ) == '1'){ echo 'checked'; } ?> />
<label for='<?php echo $inputID; ?>'><?php _e($userSpecialty); ?></label>
</div>
<?php }
}
/**
* generate_array()
* Creates, populates, and returns a multi-dimensional array holding
* the input tag's id, meta key, and text value.
*
* @return $userSpecialtiesArr Array A multi-dimensional array holding the input tag's id ("id"), meta key "meta", and text "text"
*/
function generate_array(){
$userSpecialtiesArr = array();
foreach($this->userSpecialtiesList as $userSpecialty){
$userSpecialtyPKG = array(
"text"=>$userSpecialty,
"id"=>$this->HgenerateID("specialty", $userSpecialty, "dash"),
"meta"=>$this->generateID("pref", $userSpecialty, "camelCase"),
);
array_push($userSpecialtiesArr, $userSpecialtyPKG);
}
return $userSpecialtiesArr;
}
function update_field_value($user_id) {
$user_id = $_POST['user_id'];
//Generate array to hold the neccessary information
$userSpecialtiesArr = $this->generate_array();
//Use an iterator to dynamically add the necessary unique ID and meta key.
foreach($userSpecialtiesArr as $userSpecialty) :
if ( isset($_POST[$userSpecialty['id']], $user_id ) && $_POST[$userSpecialty['id']] == 'on') {
update_user_meta( $user_id, $userSpecialty['meta'], '1');
} else {
update_user_meta( $user_id, $userSpecialty['meta'], NULL);
}
endforeach;
}
Not sure if this’ll help anyone, but if not Kinglish also had a pretty great answer and hopefully both can reduce somebody out there pulling out their hair over the same thing.