Question

How to extract lowercase characters from a string in PHP

Answer 1

function extract_lowercase($s) { 
    $len = strlen($s);
    $lower_s = ""; 
    
    for ($i = 0; $i < $len; $i++) { 
        if ($s[$i] >= 'a' && $s[$i] <= 'z') {
            $lower_s = $lower_s . $s[$i];
        }
    } 
    return $lower_s;
} 
 
  
$s = "pPHhpP"; // phpPHP

$lc = extract_lowercase($s);
 
echo $lc;
  
 
         
  
/*
run:
              
php
       
*/

 

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