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  1. <?php
  2.  
  3. $mystring = "ABEH A501; BIOL L340; BIOL Z620; Q799; ABEH A501";
  4.  
  5. echo preg_replace('/[a-zA-Z]{4}\s+[a-zA-Z]\d{3}(*SKIP)(*F)|\w+\W*/', '', $mystring);
Success #stdin #stdout 0s 82944KB
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ABEH A501; BIOL L340; BIOL Z620; ABEH A501
https://ideone.com/l3Cs1C
language:
PHP (php 7.3.5)
created:
8 years ago
visibility:
secret

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