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trim

Description

Strip whitespace (or other characters) from the beginning and end of a string

Syntax

trim(
    string $string,
    string $characters = " \n\r\t\v\x00"
): string

Parameters

string

The input string.

characters

You can also specify the characters you want to strip, by means of the characters parameter. Simply list all characters that you want to be stripped. With .. you can specify a range of characters.

CharacterASCIIDescription
"\0"ASCII 0 (0x00)the NUL-byte
"\t"ASCII 9 (0x09)a tab
"\n"ASCII 10 (0x0A)a new line (line feed)
"\v"ASCII 11 (0x0B)a vertical tab
"\r"ASCII 13 (0x0D)a carriage return
" "ASCII 32 (0x20)an ordinary space

Return

The trimmed string.

Examples

1 · string

<?

$string = "\0\t\n\v\r trim\x00\x09\x0A\x0B\x0D\x20";

$return = trim($string);

var_dump($string, $return);

?>
string(16) "    

 trim    

 "
string(4) "trim"

2 · characters · list

<?

$string = "\0\t\n\v\r trim\x00\x09\x0A\x0B\x0D\x20";
$characters = "\0\t\n\v\r mt";

$return = trim($string, $characters);

var_dump($string, $return);

?>
string(16) "    

 trim    

 "
string(2) "ri"

3 · characters · range

<?

$string = "\0\t\n\v\r trim\x00\x09\x0A\x0B\x0D\x20";
$characters = "\x00..\x20mt";

$return = trim($string, $characters);

var_dump($string, $return);

?>
string(16) "    

 trim    

 "
string(2) "ri"
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