Programming PHP

Accessing Individual Characters

The strlen( ) function returns the number of characters in a string:

$string = 'Hello, world';
$length = strlen($string);             // $length is 12

You can use array syntax (discussed in detail in Chapter 5) on a string, to address individual characters:

$string = 'Hello';
for ($i=0; $i < strlen($string); $i++) {
  printf("The %dth character is %s\n", $i, $string[$i]);
}
The 0th character is H
            
The 1th character is e
            
The 2th character is l
            
The 3th character is l
            
The 4th character is o