09-26-2011
utf-8 is ASCII-compatible, with extended characters containing nothing that ought to be interpreted as nulls or escape sequences or control chars. Nothing special should be needed as long as the server is told to expect utf-8.
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LEARN ABOUT PHP
ctype_cntrl
CTYPE_CNTRL(3) 1 CTYPE_CNTRL(3)
ctype_cntrl - Check for control character(s)
SYNOPSIS
bool ctype_cntrl (string $text)
DESCRIPTION
Checks if all of the characters in the provided string, $text, are control characters. Control characters are e.g. line feed, tab, escape.
PARAMETERS
o $text
- The tested string.
RETURN VALUES
Returns TRUE if every character in $text is a control character from the current locale, FALSE otherwise.
EXAMPLES
Example #1
A ctype_cntrl(3) example
<?php
$strings = array('string1' => "
", 'string2' => 'arf12');
foreach ($strings as $name => $testcase) {
if (ctype_cntrl($testcase)) {
echo "The string '$name' consists of all control characters.
";
} else {
echo "The string '$name' does not consist of all control characters.
";
}
}
?>
The above example will output:
The string 'string1' consists of all control characters.
The string 'string2' does not consist of all control 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_print(3).
PHP Documentation Group CTYPE_CNTRL(3)