PHP: Split string into array, like explode with no delimiter

问题

I have a string such as:

"0123456789"

and need to split EACH character into an array.

I for the hell of it tried:

explode('', '123545789');

But it gave me the obvious: Warning: No delimiter defined in explode) ..

How would I come across this? I can't see any method off hand, especially just a function

回答1:

$array = str_split("0123456789bcdfghjkmnpqrstvwxyz");

str_split takes an optional 2nd param, the chunk length (default 1), so you can do things like:

$array = str_split("aabbccdd", 2);

// $array[0] = aa
// $array[1] = bb
// $array[2] = cc  etc ...

You can also get at parts of your string by treating it as an array:

$string = "hello";
echo $string[1];

// outputs "e"

回答2:

What are you trying to accomplish? You can access characters in a string just like an array:

$s = 'abcd';
echo $s[0];

prints 'a'

回答3:

Try this:

$str = '123456789';
$char_array = preg_split('//', $str, -1, PREG_SPLIT_NO_EMPTY);

回答4:

str_split can do the trick. Note that strings in PHP can be accessed just like a chars array, in most cases, you won't need to split your string into a "new" array.

回答5:

Here is an example that works with multibyte ( UTF-8 ) strings.

$str = 'äbcd';

// PHP 5.4.8 allows null as the third argument of mb_strpos() function
do {
    $arr[] = mb_substr( $str, 0, 1, 'utf-8' );
} while ( $str = mb_substr( $str, 1, mb_strlen( $str ), 'utf-8' ) );

It can be also done with preg_split() ( preg_split( '//u', $str, null, PREG_SPLIT_NO_EMPTY ) ), but unlike the above example, that runs almost as fast regardless of the size of the string, preg_split() is fast with small strings, but a lot slower with large ones.

回答6:

Try this:

    $str = '546788';
    $char_array = preg_split('//', $str, -1, PREG_SPLIT_NO_EMPTY);

回答7:

Try this:

$str = "Hello Friend";

$arr1 = str_split($str);
$arr2 = str_split($str, 3);

print_r($arr1);
print_r($arr2);

The above example will output:

Array
(
    [0] => H
    [1] => e
    [2] => l
    [3] => l
    [4] => o
    [5] =>
    [6] => F
    [7] => r
    [8] => i
    [9] => e
    [10] => n
    [11] => d
)

Array
(
    [0] => Hel
    [1] => lo
    [2] => Fri
    [3] => end
)

回答8:

If you want to split the string, it's best to use:

$array = str_split($string);

When you have delimiter, which separates the string, you can try,

explode('' ,$string);

Where you can pass the delimiter in the first variable inside the explode such as:

explode(',',$string);

回答9:

$array = str_split("$string");

will actuall work pretty fine, BUT if you want to preserve the special characters in that string, and you want to do some manipulation with them, THAN I would use

do {
    $array[] = mb_substr( $string, 0, 1, 'utf-8' );
} while ( $string = mb_substr( $string, 1, mb_strlen( $string ), 'utf-8' ) );

because for some of mine personal uses, it has been shown to be more reliable when there is an issue with special characters

来源：https://stackoverflow.com/questions/2170320/php-split-string-into-array-like-explode-with-no-delimiter

标签

php

string

arrays

split

explode