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@ 2013-12-14T11:09:19Z

<?php

  $input = "the number of letters in mississippi = 11";
  $i=0;
  $cp = $input;
  while( !(ctype_digit($cp[$i++]) ) )
   ;
echo "{substr($input,--$i)}\n";

Output
Performance
VLD
References
Branches

ctype_digit: documentation ( source)

preferences:dark modelive preview

34.27 ms | 402 KiB | 5 Q