ctype_print

(PHP 4 >= 4.0.4, PHP 5)

ctype_print — Check for printable character(s)

Descrierea

bool ctype_print ( string $text )

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

Parametri

text: The tested string.

Valorile întoarse

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.

Exemple

Example #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";
    }
}
?>

Exemplul de mai sus va afișa:

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.

Note

Notă:
Dacă e furnizat un integer cu valoarea între -128 și 255 inclusiv, el este interpretat ca o valoare ASCII a unui singur caracter (valorilor negative li se adaugă 256 pentru a permite caractere din domeniul ASCII extins). Orice alt întreg este interpretat ca un string conținând cifrele zecimale ale întregului.

Vedeți de asemenea

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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