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@ 2019-12-04T06:52:44Z

<?php
$haystack = array (
      '01.02',
      '01.03',
      '02.05',
      '02.07'
    );
    
    $matches  = preg_grep ('/^01/i', $haystack);
    
    print_r ($matches);

Output
Performance
VLD
References
Branches

print_r: documentation ( source)
preg_grep: documentation ( source)

preferences:dark modelive preview

57.96 ms | 402 KiB | 5 Q