How to convert php string to array

In PHP, converting strings to arrays is a very common requirement. This conversion operation usually needs to be performed during program development, such as processing the data string passed by the front end and converting it into an array for subsequent processing and operations. In PHP, this task can be easily accomplished using some built-in functions.

1. explode() function

explode() function can split a string into an array according to the specified delimiter. For example, we can use commas as delimiters to convert a string into an array:

$str = "apple,banana,orange";
$arr = explode(",", $str);
print_r($arr);

The result is as follows:

Array
(
    [0] => apple
    [1] => banana
    [2] => orange
)

As can be seen, this function will return a string separated by the delimiter. Array composed of.

2. preg_split() function

For some complex strings, we need more powerful tools to split. At this time, the preg_split() function comes in handy. This function splits a string based on a regular expression and returns an array.

The following is an example:

$str = "apple   banana,orange";
$arr = preg_split('/[\s,]+/', $str);
print_r($arr);

The results are as follows:

Array
(
    [0] => apple
    [1] => banana
    [2] => orange
)

As you can see, this function successfully splits the string into an array according to spaces and commas.

3. str_split() function

The str_split() function can split a string into an array of characters of a specified length. For example, we can split the string into an array where each character is an element:

$str = "hello";
$arr = str_split($str);
print_r($arr);

The results are as follows:

Array
(
    [0] => h
    [1] => e
    [2] => l
    [3] => l
    [4] => o
)

As can be seen, this function divides the string character by character Divided into arrays.

4. unserialize() function

Many times, we need to restore a serialized string to the original array. At this time, you can use the unserialize() function to achieve:

$str = 'a:3:{i:0;s:5:"apple";i:1;s:6:"banana";i:2;s:6:"orange";}';
$arr = unserialize($str);
print_r($arr);

The results are as follows:

Array
(
    [0] => apple
    [1] => banana
    [2] => orange
)

As you can see, this function successfully restores a serialized string to the original array .

To sum up, whether it is simple string splitting or complex regular expression splitting, PHP provides convenient built-in functions to convert strings into arrays. These functions can greatly improve efficiency during the development process, allowing us to process string and array-related tasks more conveniently.

The above is the detailed content of How to convert php string to array. For more information, please follow other related articles on the PHP Chinese website!