10-09-2008
I should have mentioned that whitespace is considered to be any of the following characters:
0x09 - horizontal tab
0x0a - linefeed
0x0b - vertical tab
0x0c - form feed
0x0d - carriage return
0x20 - space
so keep that in mind when you program for trimming whitespace...
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LEARN ABOUT PHP
ctype_space
CTYPE_SPACE(3) 1 CTYPE_SPACE(3)
ctype_space - Check for whitespace character(s)
SYNOPSIS
bool ctype_space (string $text)
DESCRIPTION
Checks if all of the characters in the provided string, $text, creates whitespace.
PARAMETERS
o $text
- The tested string.
RETURN VALUES
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.
EXAMPLES
Example #1
A ctype_space(3) example
<?php
$strings = array('string1' => "
", 'string2' => "
arf12", 'string3' => '
');
foreach ($strings as $name => $testcase) {
if (ctype_space($testcase)) {
echo "The string '$name' consists of all whitespace characters.
";
} else {
echo "The string '$name' does not consist of all whitespace characters.
";
}
}
?>
The above example will output:
The string 'string1' consists of all whitespace characters.
The string 'string2' does not consist of all whitespace characters.
The string 'string3' does not consist of all whitespace characters.
NOTES
Note
If an integer between -128 and 255 inclusive is provided, it is interpreted as the ASCII value of a single character (negative val-
ues have 256 added in order to allow characters in the Extended ASCII range). Any other integer is interpreted as a string contain-
ing the decimal digits of the integer.
SEE ALSO
ctype_cntrl(3), ctype_graph(3), ctype_punct(3).
PHP Documentation Group CTYPE_SPACE(3)