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  1. <?php
  2.  
  3. $s = "My address\nInt. blabla\nblabla blabla";
  4. $s = preg_replace('~Int\.\h*([^\r\n]+)[\r\n]*~', '', $s);
  5. echo $s;
Success #stdin #stdout 0.03s 52480KB
stdin
Standard input is empty
stdout
My address
blabla blabla