PHP Validation String Does Not Contain List Of Values

Question

for example I might:

$exclude_values = ['/','.'];
$check_string = 'asdf/';
$return = 'VALID';
foreach($exclude_values as $value)
{
  if(strpos($value,$check_string) != FALSE)
  {
   $return = 'INVALID';
  }
}

return $return;

Is there a better way to do this? I've seen examples of single checks on stack just not multiple values

You can return invalid inside the IF statement, to skip some iterations — Royal Bg, Jun 08 '14 at 19:02
Yes so instead of $return = 'INVALID' it would go return FALSE or whatever. — ajameswolf, Jun 08 '14 at 19:05
Right, this was written more for visualization than production ;) — ajameswolf, Jun 08 '14 at 19:34

score 1 · Answer 1 · answered Jun 08 '14 at 21:04

1

I can't recommend any string searching function outside the multibyte or PCRE lib, because they are not always utf-8 compatible, and you'll have strange errors sooner or later.

In your case a regex is a much better solution:

return !preg_match('%[/\.]%usD', $check_string);

answered Jun 08 '14 at 21:04

inf3rno

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Can you pass an array of check values? – ajameswolf Jun 22 '14 at 17:11
Yes, you have to transform them into a regex pattern. – inf3rno Jun 22 '14 at 19:26
here is a good reference to that: http://stackoverflow.com/questions/8627334/how-to-search-in-array-with-preg-match – ajameswolf Jun 30 '14 at 18:36
Pattern modifiers `u`, `s`, and `D` don't appear to serve any purpose in this case. – mickmackusa Jun 02 '23 at 14:45

PHP Validation String Does Not Contain List Of Values

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