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trim

Description

The trim of String for PHP strips 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

The list of all the characters that need 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

Returns a string with whitespace stripped from the beginning and end of the string.

Examples

1 · string

<?

$string = "\0\t\n\v\r \x00\x09\x0A\x0B\x0D\x20string\0\t\n\v\r \x00\x09\x0A\x0B\x0D\x20";

$return = trim($string);

var_dump($string, $return);

string(30) "    

     

 string    

     

 "
string(6) "string"

2 · characters · list

<?

$string = "\0\t\n\v\r \x00\x09\x0A\x0B\x0D\x20string\0\t\n\v\r \x00\x09\x0A\x0B\x0D\x20";
$characters = "\0\t\n\v\r stng";

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

var_dump($string, $return);

string(30) "    

     

 string    

     

 "
string(2) "ri"

3 · characters · range

<?

$string = "\0\t\n\v\r \x00\x09\x0A\x0B\x0D\x20string\0\t\n\v\r \x00\x09\x0A\x0B\x0D\x20";
$characters = "\x00..\x20stng";

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

var_dump($string, $return);

string(30) "    

     

 string    

     

 "
string(2) "ri"