CODEWITHSUNDEEP
phpwordpress
eliHimself
eliHimself

Reputation: 77

Wordpress update_user_metadata is not giving $prev_value

I am trying to see if a user's field value was changed, if it was changed i need to run some code. So, the best way i found to do this was use this filter hook.

https://codex.wordpress.org/Plugin_API/Filter_Reference/update_(meta_type)_metadata

However, for some reason i am getting null if i try to output my $prev_value and my field was not blank before. Why is that?

function myplugin_init() {
    add_filter( 'update_user_metadata', 'myplugin_update_foo', 10, 5 );
}

function myplugin_update_foo( $null, $object_id, $meta_key, $meta_value, $prev_value ) {

    if ( 'last_name' == $meta_key ) {
    echo "<h1>Prev: ". $prev_value ."</h1>";
    echo "<h1>New: ". $meta_value ."</h1>";
  }

    return null; // this means: go on with the normal execution in meta.php

}

add_action( 'init', 'myplugin_init' );

Upvotes: 0

Views: 531

Answers (2)

user10758246
user10758246

Reputation: 11

I ran into a similar problem. If you call update_user_meta, you need to add a fourth argument with the previous value. e.g.:

update_user_meta( $user_id, 'custom_field', 'new_value', get_user_meta( $user_id, 'custom_field', true ) );

Only then you will have access to the prev_value in the update_user_metadata filter & action.

Upvotes: 1

Charlie Vieillard
Charlie Vieillard

Reputation: 792

It seems the WordPress action update_user_metadata only has four parameters.

You are using $prev_value as a fifth parameter so it will always be null.

<?php
add_action( 'updated_user_meta', 'my_update_user_meta', 10, 4 );

function my_update_user_meta($meta_id, $object_id, $meta_key, $_meta_value) {
    //do stuff
} ?>

Reference: https://codex.wordpress.org/Plugin_API/Action_Reference/updated_(meta_type)_meta

Upvotes: 0

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