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  1. <?php
  2.    $string = '@aåböc';
  3.    $pattern = '/([^a-z0-9@]|(?<!^)@)/i';
  4.    $replacement = '';
  5.    echo $string . ' -> ' . preg_replace($pattern, $replacement, $string);
  6.    echo ' /// ';
  7.    $str2 = 'abcåäö1@23';
  8.    echo $str2 . ' -> ' . preg_replace($pattern, $replacement, $str2);	
  9. ?>
Success #stdin #stdout 0.01s 20568KB
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Standard input is empty
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@aåböc -> @abc /// abcåäö1@23 -> abc123
https://ideone.com/yGzhPV
language:
PHP (php 7.3.5)
created:
12 years ago
visibility:
public

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