ctype_punct
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;
}
?>
ctype_space
(PHP 4 >= 4.0.4, PHP 5)
ctype_space — Controlla gli spazi
Descrizione
bool ctype_space
( string
$testo
)
Restituisce TRUE se ogni carattere di testo
crea qualche tipo di spazio, FALSE in caso contrario. Oltre allo
spazio questo include anche tab, tab verticale, line feed (avanza di una riga),
carriage return (a capo) e form feed (avanza di un modulo).
Example #1 Esempio di uso di 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";
}
}
?>
Questo esempio visualizzerà :
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.
Vedere anche ctype_cntrl(), ctype_graph() e ctype_punct().
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User Contributed Notes
ctype_space - [1 notes]
gardnerjohng at hotmail dot com ¶
3 years ago