Question

How to remove all non-alphanumeric characters from a string in PHP

Answer 1

$str = 'Python, #Java@ !C 100 ^&CPP (*)PHP.';

$pattern = '/[^a-zA-Z0-9\s]/';

$str = preg_replace($pattern, "", $str);

echo $str;




/*
run:

Python Java C 100 CPP PHP

*/

 

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Answer 2

$str = 'PHP Python, #Java@ !C 100 ^&CPP (*)Rust.';

$pattern = '/[^a-zA-Z0-9]/';

$str = preg_replace($pattern, "", $str);

echo $str;




/*
run:

PHPPythonJavaC100CPPRust

*/

 

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Answer 3

$s = "@#$23PHP#(%*/?999~`;";
 
$s = preg_replace('/[\W]/', '', $s);
 
echo $s;
       
  
/*
run:
  
23PHP999 
     
*/

 

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Answer 4

$s = "@#$23PHP#(%*/?999~`;";
 
$s = preg_replace('/[^a-z0-9]/i', '', $s); 
 
echo $s;
       
  
/*
run:
  
23PHP999 
     
*/

 

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