trim

Definition and usage

The trim() function removes whitespace characters or other predefined characters on both sides of the string.

Related functions:

• ltrim() - Removes whitespace or other predefined characters to the left of the string
• rtrim() - Removes whitespace or other predefined characters to the right of the string

Example

Example 1

Remove characters on both sides of the string ("He" in "Hello" and "d!" in "World"):

 <?php
$str = "Hello World!" ;
echo $str . "<br>" ;
echo trim ( $str , "Hed!" ) ;
?>

Try it yourself

Example 2

Remove spaces on both sides of the string:

 <?php
$str = " Hello World!" ;
echo "Don't use trim: " . $str ;
echo "<br>" ;
echo "Use trim: " . trim ( $str ) ;
?>

The HTML output of the above code is as follows (please check the source code):

 < ! DOCTYPE html >
< html >
< body >

Don't use trim : Hello World ! < br > Use trim : Hello World !
< / body >
< / html >

The browser output of the above code is as follows:

 Don't use trim: Hello World!
Use trim: Hello World!

Try it yourself

Example 3

Remove the newline character (\n) on both sides of the string:

 <?php
$str = "\n\n\n\nHello World!\n\n\n" ;
echo "Don't use trim: " . $str ;
echo "<br>" ;
echo "Use trim: " . trim ( $str ) ;
?>

The HTML output of the above code is as follows (please check the source code):

 < ! DOCTYPE html >
< html >
< body >

Don't use trim :


Hello World !


< br > Use trim : Hello World !
< / body >
< / html >

The browser output of the above code is as follows:

 Don't use trim: Hello World!
Use trim: Hello World!

Try it yourself

grammar

 trim ( string , charlist )