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@ 2017-09-30T18:10:23Z

<?php
$strings = array('url/?page=2&filter=value',
'url/?page=2',
'url/?filter=value&page=2',
'url/?filter=value&page=2&filter2=value');
foreach($strings as $string){
    echo rtrim(preg_replace('/([?&])page=[^&]*&?/', '$1', $string), '&?') . PHP_EOL;
}

Output
Performance
VLD
References
Branches

rtrim: documentation ( source)
preg_replace: documentation ( source)

preferences:dark modelive previewkey bindings

35.73 ms | 405 KiB | 5 Q