ctype_space

Check for whitespace character(s)

ctype_space(mixed $text): bool

text

The tested string.

Note: If an integer between -128 and 255 inclusive is provided, it is interpreted as the ASCII value of a single character (negative values have 256 added in order to allow characters in the Extended ASCII range). Any other integer is interpreted as a string containing the decimal digits of the integer.

Returns true if every character in text creates some sort of white space, false otherwise.

Besides the blank character this also includes tab, vertical tab, line feed, carriage return and form feed characters.

<?

$text = "\x09\x0a\x0b\x0c\x0d\x20\t\n\v\f\r ";

$return = ctype_space($text);

var_export($return);

?>

true

<?

for($i = 0; $i <= 255; ++$i)
{
    $return = ctype_space($i);

    if($return)
    {
        $character = chr($i);

        echo "$i: $character\n";
    }
}

?>

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32:  

ctype_alnum

ctype_alpha

ctype_cntrl

ctype_digit

ctype_graph

ctype_lower

ctype_print

ctype_punct

ctype_upper

ctype_xdigit

PHP