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@ 2017-06-08T19:53:35Z

<?php
$row['addressLine1'] = 'Warsaw';
if (preg_match('/^[A-Za-z0-9]+$/', $row['addressLine1']) == 1) {
    echo $row['addressLine1'].'<br/>';
}
else {
    echo 'no match'.'<br/>';
}

Output
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preg_match: documentation ( source)

preferences:dark modelive preview

61.43 ms | 402 KiB | 5 Q