Submit a Pull Request Report a Bug

ctype_space

(PHP 4 >= 4.0.4, PHP 5, PHP 7, PHP 8)

ctype_space — Verifica se os caracteres são whitespace

Descrição

ctype_space(string $text): bool

Verifica se todos os caracteres na string fornecida, text, são whitespace.

Parâmetros

text: A string a ser testada.

Valor Retornado

Retorna true se todos caracteres em text são white space, false caso contrário. Além de caracteres em branco isto também inclui os caracteres tab, vertical tab, line feed, carriage return e form feed.

Exemplos

Exemplo #1 Um exemplo da ctype_space()


<?php
$strings = array('string1' => "\n\r\t", 'string2' => "\narf12", 'string3' => '\n\r\t');
foreach ($strings as $name => $testcase) {
    if (ctype_space($testcase)) {
        echo "The string '$name' consists of all whitespace characters.\n";
    } else {
        echo "The string '$name' does not consist of all whitespace characters.\n";
    }
}
?>

O exemplo acima produzirá:

The string 'string1' consists of all whitespace characters.
The string 'string2' does not consist of all whitespace characters.
The string 'string3' does not consist of all whitespace characters.

Veja Também

ctype_cntrl() - Verifica se os caracteres são de controle
ctype_graph() - Verifica se os caracteres são imprimíveis exceto espaço
ctype_punct() - Verifica se é um caractere imprimível que não é whitespace ou alfanumério

＋add a note

User Contributed Notes 2 notes

down

gardnerjohng at hotmail dot com ¶

13 years ago


A function I wrote last night was fairly flexible in terms of detecting whitespace, and even took into account the pesky non-breaking spaces / zero-width spaces further up the Unicode alphabet.



The benefit here was being able to isolate and identify specific Unicode indices based on their subrange.



<?php

    //    Returns TRUE if the ASCII value of $string matches a registered whitespace character.

    //    *    This includes non-breaking spaces, zero-width spaces, and any unicode values below 32.

    //    *    $string: Character to identify. If string extends past one character, the value

    //        is truncated and only the initial character is examined.

    function is_whitespace($string){

        //    Return FALSE if passed an empty string.

        if($string == "") return FALSE;

        

        $char    =    ord($string);

        

        //    Control Characters

        if($char < 33)                        return TRUE;

        if($char > 8191 && $char < 8208)    return TRUE;

        if($char > 8231 && $char < 8240)    return TRUE;

        

        //    Additional Characters

        switch($char){

            case 160:    // Non-Breaking Space

            case 8287:    // Medium Mathematical Space

                return TRUE;

                break;

        }

        return FALSE;

    }

?>

down

vlabots at gmail dot com ¶

8 years ago


thanks to gardnerjohng, but a had some problems with non-breaking spaces in this function.

I added 2 more cases for this: 
case 0xC2
case 0xA0

After this modification non-breaking spaces in my test code were successfully detected.

＋add a note