How to convert a string to an array in PHP

In PHP, strings and arrays are one of the most commonly used data types. Since strings and arrays have different data structures, converting strings into arrays can make operations and processing more convenient. Here's how to convert a string into an array.

1. Use the explode() function in PHP

In PHP, use the explode() function to split the string according to the specified delimiter. The subsequent data will be put into an array and returned. The following is a sample code:

$str = "apple,banana,orange";
$arr = explode(",", $str);
print_r($arr);
//输出 Array ( [0] => apple [1] => banana [2] => orange )

In the above code, a comma is used as the delimiter to split the string. The result will be put into an array and output through the print_r() function.

2. Use the str_split() function in php

Different from the explode() function, the str_split() function will convert a string into a character array, Each character will be split into separate elements. The following is a sample code:

$str = "hello world";
$arr = str_split($str);
print_r($arr);
//输出 Array ( [0] => h [1] => e [2] => l [3] => l [4] => o [5] => [6] => w [7] => o [8] => r [9] => l [10] => d )

In the above code, the str_split() function is used to split the string into individual characters and put the result into an array.

3. Use regular expressions

If you need to split a string according to certain rules, you can use regular expressions. In PHP, the preg_split() function can split a string into an array based on a specified regular expression. The following is a sample code:

$str = "001.hello.002.world.003";
$arr = preg_split("/\./", $str);
print_r($arr);
//输出 Array ( [0] => 001 [1] => hello [2] => 002 [3] => world [4] => 003 )

In the above code, the regular expression \. is used as the delimiter to split the string into an array.

Summary

Through PHP's built-in functions, a string can be converted into an array for easy operation and processing. You can use the explode() function, str_split() function or regular expressions to select the most appropriate method according to your needs to convert a string into an array.

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