php电话号码中的“0”和“+”怎么去掉

Question

The "0" and "+" from the phone number must be removed. And also need to turn the phone number into a WhatsApp link.

Example: +971 561545785

Output: https://wa.me/971561545785

i have tried like this,

$countryCode = "+971";

$phone_number = "561545785";

$newNumber = preg_replace('/^0+?/', 'https://wa.me/'.$countryCode, $phone_number);

But this only removing the zero from. how can i remove 0 and + from phone number and save a WhatsApp link.

Answer 1

Use options inside square brackets

/^[0+]?/