Question

How to extract digits from a string in PHP

Answer 1

function extract_digits($s) { 
    for ($i = 0; $i < strlen($s); $i++) { 
        if (is_numeric($s[$i])) {
           echo $s[$i] . "<br />"; 
        }
    } 
} 
  
$s = "1PHP39"; 
echo extract_digits($s);

  
  
/*
run:
       
1
3
9
      
*/

 

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