Blog : PHP trim() Function

PHP trim() Function

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 Complete PHP String Reference
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Definition and Usage
The trim() function removes whitespaces and other predefined characters from both sides of a string.

Syntax
trim(string,charlist)  

Parameter Description
string Required. Specifies the string to check
charlist Optional. Specifies which characters to remove from the string. If omitted, all of the following characters are removed:
"\0" - NULL
"\t" - tab
"\n" - new line
"\x0B" - vertical tab
"\r" - carriage return
" " - ordinary white space
 


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Example 1


$str = " Hello World! ";
echo "Without trim: " . $str;
echo "
";
echo "With trim: " . trim($str);
?>

 

The browser output of the code above will be:

Without trim: Hello World!
With trim: Hello World!  

If you select "View source" in the browser window, you will see the following HTML:



Without trim:  Hello World! 
With trim: Hello World!

 


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Example 2
$str = "\r\nHello World!\r\n";
echo "Without trim: " . $str;
echo "
";
echo "With trim: " . trim($str);
?>  

The browser output of the code above will be:

Without trim: Hello World!
With trim: Hello World!  

If you select "View source" in the browser window, you will see the following HTML:



Without trim:
Hello World!

With trim: Hello World!