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@ 2013-06-07T05:54:29Z

<?php
if((strpos($tr_code,'B')!== false)){ //print out anything contain "B"
        echo 1; 
     }
else
       2;

Output
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References
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strpos: documentation ( source)

preferences:dark modelive preview

41.08 ms | 402 KiB | 5 Q