ltrim
Description
Syntax
ltrim(
string $string,
string $characters = " \n\r\t\v\x00"
): stringParameters
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.
| Character | ASCII | Description |
|---|---|---|
| "\0" | ASCII 0 (0x00) | NUL-byte |
| "\t" | ASCII 9 (0x09) | horizontal tab |
| "\n" | ASCII 10 (0x0A) | new line (line feed) |
| "\v" | ASCII 11 (0x0B) | vertical tab |
| "\r" | ASCII 13 (0x0D) | carriage return |
| " " | ASCII 32 (0x20) | ordinary space |
Return
Returns a string with whitespace stripped from the beginning of string.
Examples
1 · string
<? $string = "\0\t\n\v\r \x00\x09\x0A\x0B\x0D\x20ltrim"; $return = ltrim($string); var_dump($string, $return); ?>
string(17) "
ltrim"
string(5) "ltrim"
2 · characters · list
<? $string = "\0\t\n\v\r \x00\x09\x0A\x0B\x0D\x20ltrim"; $characters = "\0\t\n\v\r lt"; $return = ltrim($string, $characters); var_dump($string, $return); ?>
string(17) "
ltrim"
string(3) "rim"
3 · characters · range
<? $string = "\0\t\n\v\r \x00\x09\x0A\x0B\x0D\x20ltrim"; $characters = "\x00..\x20lt"; $return = ltrim($string, $characters); var_dump($string, $return); ?>
string(17) "
ltrim"
string(3) "rim"
Links
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