ctype_print

(PHP 4 >= 4.0.4, PHP 5)

ctype_print — Check for printable character(s)

Opis

bool ctype_print ( string $text )

Checks if all of the characters in the provided string, text, are printable.

Parametry

text: The tested string.

Zwracane wartości

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.

Przykłady

Przykład #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";
    }
}
?>

Powyższy przykład wyświetli:

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.

Notatki

Informacja:
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.

Zobacz też:

ctype_cntrl() - Check for control character(s)
ctype_graph() - Check for any printable character(s) except space
ctype_punct() - Check for any printable character which is not whitespace or an alphanumeric character

add a note User Contributed Notes ctype_print - [2 notes]

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Anonymous ¶

11 months ago


Only ascii 32 thru 126 (inclusive) are considered printable. Tab (ascii 7), carriage return (ascii 13), linefeed (ascii 10) etc may produce output but are not considered printable.

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-1

flatline at greyhat dot nl ¶

9 years ago


It seems that this function does not recognize characters such as '�', '�', '�', '�' as printable.





Depends on your locale settings, in the default "C" locale they are


indeed not printable as it is 7bit ASCII based. (hartmut)

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