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  1. <?php
  2.  
  3. function valid_time($time){
  4.         $m = substr($time, -2);
  5.         $h = (explode(':', substr($time, 0, -2)));
  6.         $h = $h[0];
  7.         return (is_numeric($h) && is_numeric($m) && $h>0 && $h<13 && $m>=0 && $m<60);
  8. }
  9.  
  10. $times = array(
  11.        '100',          # valid
  12.        '1100',         # valid
  13.        '1300',         # invalid
  14.        '01:00',        # valid
  15.        '12:59',        # valid
  16.        '00:01',        # invalid
  17.        '00:25pm',      # invalid
  18.        '0000',         # invalid
  19.        'a00',          # invalid
  20.        '00',           # invalid
  21.        );
  22. foreach($times as $time){
  23.         printf("%10s => %7s\n",  $time,  (valid_time($time)? "valid" : "invalid"));
  24. }
  25. ?>
  26.  
Success #stdin #stdout 0.02s 13112KB
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stdin
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Standard input is empty
stdout
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       100 =>   valid
      1100 =>   valid
      1300 => invalid
     01:00 =>   valid
     12:59 =>   valid
     00:01 => invalid
   00:25pm => invalid
      0000 => invalid
       a00 => invalid
        00 => invalid
https://ideone.com/tSQIb
language:
PHP (php 7.3.5)
created:
11 years ago
visibility:
public

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