从Woocommerce结帐字段中的电话号码中删除前导0

Question

I am trying to remove the leading '0' from the phone number so that if a customer enters his/her phone number as '0856xxxxxxx' it turns to '856xxxxxxx' removing leading zero. I did some research on Internet and found that ltrim() function can be used so I updated my code in functions.php as below:

add_action('woocommerce_checkout_process', 'removeLeadingZero');

    function removeLeadingZero() {
        $billing_phone = filter_input(INPUT_POST, 'billing_phone');
    $billing_phone= ltrim($billing_phone, '0');
    }

Above code is not giving any output. Now the problem is I don't know how to return the updated value so that the final value becomes as desired.

Thanks

Answer 1

My given code is able to remove the leading zero, the problem I am facing is to update the number in the checkout field.

$num = "0852360852";
if(stripos($num,"0") === 0){
    echo ltrim($num,"0");
}

Answer 2

did you try something like :

<?php

add_action('woocommerce_checkout_process', 'removeLeadingZero');

function removeLeadingZero() {
    if (isset($_POST['billing_phone'])) {
       $_POST['billing_phone'] = preg_replace('/^0/', '', $_POST['billing_phone']);
    }
}