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  1. <?php
  2.  
  3. $str = 'www.domain.com?adult=2&airport=40-48?destination=recko';        
  4. echo preg_replace_callback('/^([^?]*[?])|[?]/', function($m) {
  5. 	return !empty($m[1]) ? $m[1] : "&";
  6. }, $str );
Success #stdin #stdout 0.04s 52480KB
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www.domain.com?adult=2&airport=40-48&destination=recko
https://ideone.com/mdUp4G
language:
PHP (php 7.3.5)
created:
9 years ago
visibility:
secret

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