phpnumbersstring-matchinglettertextmatching

How can I check if a char is a letter or a number?

I have a string and I want to loop it so that I can check if every char is a letter or number.

$s = "rfewr545 345b";

for ($i=1; $i<=strlen($s); $i++) {
   if ($a[$i-1] == is a letter) {
      echo $a[$i-1]." is a letter";
   } else {
      echo $a[$i-1]." is a number";
   }
}

How can I check if a char is a letter or a number?

Solution

  • To test if character is_numeric, use:

    is_numeric($a[$i-1])

    As below:

    $s = "rfewr545 345b";
for ($i = 0; $i < strlen($s); $i++){
   $char = $s[$i];
   if (is_numeric($char)) {
      echo $char . ' is a number';
   } else {
      echo $char . ' is a letter';
   }
}