Get float value of a variable with non-numeric leftmost characters in PHP

Description

The following code shows how to get float value of a variable with non-numeric leftmost characters.

Example

<?php//from  www.ja v a 2s .c  om
$var = 'The122.34343';
$float_value_of_var = floatval($var);
echo $float_value_of_var; // 0
?>

The code above generates the following result.