Split a string into two equal length parts using PHP [duplicate]

Question

I need to split a string into two equal length parts.String can contain blank spaces, commas or anything. I have referred and tries the code sample of explode statement from the link http://www.testingbrain.com/php-tutorial/php-explode-split-a-string-by-string-into-array.html but there it not showing any sample for splitting by equal length.

One more thing, while splitting words shouldn't broken.

Answer 1

This will split without breaking the word, at the most possible half of the text, but it may split at any other characters (,,.,@ etc)

$data = "Split a string by length without breaking word"; //string

if (strlen($data) % 2 == 0) //if lenhth is odd number
    $length = strlen($data) / 2;
else
    $length = (strlen($data) + 1) / 2; //adjust length

for ($i = $length, $j = $length; $i > 0; $i--, $j++) //check towards forward and backward for non-alphabet
{
    if (!ctype_alpha($data[$i - 1])) //forward
    {
        $point = $i; //break point
        break;
    } else if (!ctype_alpha($data[$j - 1])) //backward
    {
        $point = $j; //break point
        break;
    }
}
$string1 = substr($data, 0, $point);
$string2 = substr($data, $point);