ctype_print

(PHP 4 >= 4.0.4, PHP 5, PHP 7)

ctype_printCheck for printable character(s)

Descrierea

ctype_print ( mixed $text ) : bool

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

Parametri

text

The tested string.

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.

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.

A se vedea și

  • 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

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User Contributed Notes 2 notes

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4
Anonymous
11 years 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.
up
3
ClayDragon
5 years ago
As mentioned above, only ASCII characters from 32 to 126 are considered printable, all others, including UTF-8 encoded characters are always considered unprintable, no matter what your locale settings are. Therefore, e.g. German "ä", the Euro sign "€" or the British pound symbol "£" will never be printable. If you need to check any characters for "printability" beyond the standard ASCII range, use a regular expression or write a specific function yourself.

See also this discussion: https://grokbase.com/t/php/php-i18n/102tkqe6rk/ctype-print-returns-false-for-british-pound-symbol-and-non-ascii-symbols
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