(PHP 4 >= 4.0.4, PHP 5, PHP 7)
ctype_space — Check for whitespace character(s)
$text
) : bool
Checks if all of the characters in the provided string,
text, creates whitespace.
textThe tested string.
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.
Example #1 A ctype_space() example
<?php
$strings = array(
'string1' => "\n\r\t",
'string2' => "\narf12",
'string3' => '\n\r\t' // note the single quotes
);
foreach ($strings as $name => $testcase) {
if (ctype_space($testcase)) {
echo "The string '$name' consists of whitespace characters only.\n";
} else {
echo "The string '$name' contains non-whitespace characters.\n";
}
}
?>
The above example will output:
The string 'string1' consists of whitespace characters only. The string 'string2' contains non-whitespace characters. The string 'string3' contains non-whitespace characters.
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.