Question

How to move all uppercase characters to the beginning of string in PHP

Answer 1

function move_uppercase_to_beginning($s) { 
    $len = strlen($s);
    $lowercase = "";  
    $uppercase = "";  
   
    for ($i = 0; $i < $len; $i++) {  
        $ch = $s[$i] ;  
        if ($ch >= 'A' && $ch <= 'Z') {  
            $uppercase .= $ch;  
        }  
        else {  
            $lowercase .= $ch;  
        }  
    }  
    return $uppercase . $lowercase;
}  


$s = "C++ PHP Java";  
 
echo move_uppercase_to_beginning($s); 


  
/*
run:
         
CPHPJ++ ava
  
*/

 

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