ctype_print
(PHP 4 >= 4.0.4, PHP 5)
ctype_print -- Check for printable character(s)
说明
bool
ctype_print
( string text )
Checks if all of the characters in the provided string,
text
, are printable.
返回值
Returns
TRUE
if every character in
text
will actually create output (including blanks). Returns
FALSE
if
text
contains control characters or characters
that do not have any output or control function at all.
范例
例子 1. A
ctype_print()
example
<?php
$strings
= array(
'string1'
=>
"asdf\n\r\t"
,
'string2'
=>
'arf12'
,
'string3'
=>
'LKA#@%.54'
);
foreach (
$strings
as
$name
=>
$testcase
) {
if (
ctype_print
(
$testcase
)) {
echo
"The string '$name' consists of all printable characters.
\n
"
;
} else {
echo
"The string '$name' does not consist of all printable characters.
\n
"
;
}
}
?>
|
上例将输出：
The string 'string1' does not consist of all printable characters.
The string 'string2' consists of all printable characters.
The string 'string3' consists of all printable characters.
|
|