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phpregexsplitsquare-bracketcharacter-class

What special meaning do square braces have in a regular expression?

Can anyone explain me this code split("[ ]+", $s); thanks

$s = "Split this sentence by spaces";
$words = split("[ ]+", $s);
print_r($words);

Output:
Array
(
    [0] => Split
    [1] => this
    [2] => sentence
    [3] => by
    [4] => spaces
)
Solution

  • Split string into array by regular expression. This function has been DEPRECATED as of PHP 5.3.0. Relying on this feature is highly discouraged.

    I reccommend 'explode' function instead 'split':

    $s = "Split this sentence by spaces";
$words = explode(" ", $s);

print_r($words);

    Output:

    array(5) {
 [0]=>
 string(5) "Split"
 [1]=>
 string(4) "this"
 [2]=>
 string(8) "sentence"
 [3]=>
 string(2) "by"
 [4]=>
 string(6) "spaces"
}