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There are three PHP trim functions which are used to remove the white spaces from start, end or both sides of a string.
White Spaces include

• " " (Normal Space Characters)
• "\t" (Tabs)
• "\r" (Return Characters)
• "x0B" (Vertical Tab Characters)
• "\0" (NULL Bytes)

Following are functions to remove above White Spaces from a string

Function to Remove White Spaces From Beginning of String:-
ltrim();

Can be Used As


$string = ltrim($string);
?>

Function to Remove White Spaces From End of String:-
rtrim();

Can be Used As


$string = rtrim($string);
?>

Function to Remove White Spaces From Beginning and end of String:-
trim();

Can be Used As


$string = trim($string);
?>

So start using it :-)