There are three functions in PHP to remove the whitespaces from the string.
trim() : It removes whitespaces from the left and right side of the string.
ltrim() : It removes whitespaces from the left side of the string.
rtrim() : It removes whitespaces from the right side of the string.
Exmple :
$str = " Tutorials for your help";
$val1 = trim($str);
$val2 = ltrim($str);
$val3 = rtrim($str);​