How to convert php string into array

In PHP, strings and arrays are very common data types. Sometimes we need to convert a string into an array for easy operation and processing. In this article, we will discuss methods and techniques for converting strings into arrays.

1. Use the explode() function

PHP’s built-in function explode() can split a string into an array. This function takes a delimiter as argument and splits the string into an array. The following is an example of using the explode() function to convert a string into an array:

$str = "hello world";
$arr = explode(" ", $str);
print_r($arr);

In this example, we split the string "hello world" into two words and store them in the array $arr . Use the print_r() function to output the array to the screen:

Array
(
    [0] => hello
    [1] => world
)

2. Use the preg_split() function

PHP’s preg_split() function can use regular expressions as delimiters to split characters string. This function is similar to the explode() function, but more flexible and powerful. The following is an example of using the preg_split() function to convert a string into an array:

$str = "hello,world";
$arr = preg_split("/[,\s]+/", $str);
print_r($arr);

In this example, we use the regular expression "/[,\s] /" as the delimiter to split the string. This regular expression indicates the use of commas or spaces (\s) as delimiters, and allows multiple delimiters to appear consecutively. Finally, we store the split string in the array $arr and use the print_r() function to output the array:

Array
(
    [0] => hello
    [1] => world
)

3. Use the str_split() function

PHP’s str_split() function A string can be split into an array of individual characters. Here is an example of using the str_split() function to convert a string into an array:

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

In this example, we split the string "hello" into individual characters and store them in the array $arr. Use the print_r() function to output the array to the screen:

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

Summary:

Converting a string into an array is a basic operation in PHP. Three common methods are introduced above. : Use explode() function, use preg_split() function, use str_split() function. By using these functions, we can easily convert strings into arrays for easy manipulation and processing.

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