ctype_space
(PHP 4 >= 4.0.4, PHP 5)
ctype_space -- Check for whitespace character(s)
说明
bool
ctype_space
( string text )
Checks if all of the characters in the provided string,
text
, creates whitespace.
返回值
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.
范例
例子 1. A
ctype_space()
example
<?php
$strings
= array(
'string1'
=>
"\n\r\t"
,
'string2'
=>
"\narf12"
,
'string3'
=>
'\n\r\t'
);
foreach (
$strings
as
$name
=>
$testcase
) {
if (
ctype_space
(
$testcase
)) {
echo
"The string '$name' consists of all whitespace characters.
\n
"
;
} else {
echo
"The string '$name' does not consist of all whitespace characters.
\n
"
;
}
}
?>
|
上例将输出：
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.
|
|