在PHP中，如何使用各种字符的字符串并将其转换为只有A-Z和0-9个字符的字符串？ [重复]

Possible Duplicate:
how to replace special characters with the ones they’re based on in PHP?

I have a string that looks like this:

ABCÇĆDEFGHÎIïJ123450086

In PHP how can I make it appear as:

ABCDEFGHIJ123450086

without having to manually replace each character not needed. Can I use some kind of RegEx for this? How?

I just want A-Z and 0-9, no other foreign characters (as in, remove them).

Use character classes:

$string = preg_replace('/[^\w\d]/', '', $string);

Replaces all occurences of characters which are not ([^]) alphabetic (\w), nor a digit (\d) with an empty string.

Assuming you want to remove them, You can use preg_replace to replace all characters that are not in the ranges a-z, A-Z and 0-9 with '';

Otherwise use the translation technique given in the other thread.

You can always use regular expressions.

preg_replace('/^[A-Za-z0-9]/', '', $some_str)

Use a whitelist:

$input = 'ABCÇĆDEFGHÎIïJ123450086';
$filtered = preg_replace("~[^a-zA-Z0-9]+~","", $input);

A nice function :

/**
 * Strip accents
 *
 * @param string $str string to clean
 * @param string $encoding encoding type (example : utf-8, ISO-8859-1 ...)
 */
function strip_accents($str, $encoding='utf-8') {
    // transforme accents chars in entities
    $str = htmlentities($str, ENT_NOQUOTES, $encoding);

    // replace entities to have the first nice char
    // Example : "&ecute;" => "e", "&Ecute;" => "E", "Ã " => "a" ...
    $str = preg_replace('#&([A-za-z])(?:acute|grave|cedil|circ|orn|ring|slash|th|tilde|uml);#', '\1', $str);

    // Replace ligatures like : Œ, Æ ...
    // Example "Å“" => "oe"
    $str = preg_replace('#&([A-za-z]{2})(?:lig);#', '\1', $str);
    // Delete else
    $str = preg_replace('#&[^;]+;#', '', $str);

    return $str;
}

// Example
$texte = 'Ça va mon cœur adoré?';
echo suppr_accents($texte);
// Output : "Ca va mon coeur adore?"

Source : http://www.infowebmaster.fr/tutoriel/php-enlever-accents