find the kth character in a string in php

To find the k-th character in a string in PHP, you can use the substr function.

The substr function allows you to extract a part of a string, starting from a specific index and with a specific length.

To extract a single character from a string, you can pass the starting index and a length of 1 to the substr function.

Here's an example of how to find the 5th character in a string:

main.php
$str = "Hello, world!";
$k = 4; // index starts at 0

$character = substr($str, $k, 1);

echo $character; // outputs "o"
121 chars
7 lines

In this example, the $str variable contains the string "Hello, world!". The $k variable is set to 4, which is the index of the 5th character in the string, as indexing starts from 0.

The substr function extracts a substring starting from the 4th index and with a length of 1, which corresponds to the 5th character in the original string.

The $character variable contains the extracted character, which is then outputted to the screen using the echo statement.