How do you check if a string contains any special character in php?

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preg_match php special characters

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Hi all, I want to check if these characters exist in a string by using preg_match:

^'£$%^&*()}{@'#~?><>,@|\-=-_+-¬'

Help please!

SharpC

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asked Oct 14, 2010 at 22:12

4

<>,|=_+¬-]/', $string))
{
    // one or more of the 'special characters' found in $string
}

answered Oct 14, 2010 at 22:20

chigleychigley

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3

preg_match('/'.preg_quote('^\'£$%^&*()}{@#~?><,@|-=-_+-¬', '/').'/', $string);

answered Oct 15, 2010 at 1:47

PetahPetah

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1

Not the answer you're looking for? Browse other questions tagged php or ask your own question.

To check if a string has a special character, the PHP code is as follows;

Example

 Live Demo

?/|}{~:]', $my_string);
      if($regex)
         print("String has been accepted");
      else
         print("String has not been accepted");
   }
   $my_string = 'This_is_$_sample!';
   check_string($my_string);
?>

Output

String has not been accepted

Above, a function named ‘check_string’ is defined, that takes a string as its parameter −

$my_string = 'This_is_$_sample!';

Use regular expression to check if a string has a special character. If there is a special character, a specific message is printed. Outside the function, the string is defined, and the function is called by passing the string as parameter −

function check_string($my_string){
   $regex = preg_match('[@_!#$%^&*()<>?/|}{~:]', $my_string);
   if($regex)
      print("String has been accepted");
   else
      print("String has not been accepted");
}

Updated on 17-Aug-2020 11:31:47

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How do I check if a string contains special characters?

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