How to convert string to array using php

When developing PHP code, we sometimes need to split a string into multiple substrings according to newlines and store these substrings in an array. This article will introduce how to use PHP's built-in functions to quickly convert strings into arrays.

Use the explode() function to convert a string into an array

A quick and easy way is to use the built-in function explode(), which splits a string into multiple sub-arrays according to the specified delimiter. string and store these substrings into an array. For example, the following code splits a string into multiple substrings according to the "\n" newline character and prints each string:

// 定义需要转换的字符串
$str = "Hello\nWorld\nPHP\n";

// 按照换行符分割字符串，存储到数组中
$arr = explode("\n", $str);

// 遍历数组，并打印每个字符串
foreach ($arr as $str) {
    echo $str . "<br>";
}

The output result is:

Hello
World
PHP

Use preg_split( ) function to convert string to array

Another method is to use the regular expression function preg_split() to convert string to array. For example, the following code splits a string into multiple substrings according to newlines and prints each string:

// 定义需要转换的字符串
$str = "Hello\nWorld\nPHP\n";

// 按照换行符分割字符串，存储到数组中
$arr = preg_split('/\n/', $str, -1, PREG_SPLIT_NO_EMPTY);

// 遍历数组，并打印每个字符串
foreach ($arr as $str) {
    echo $str . "<br>";
}

The output result is:

Hello
World
PHP

Among them, the third parameter - 1 means not to limit the number of results returned, and the fourth parameter PREG_SPLIT_NO_EMPTY means to remove empty strings in the split results.

Summary

In PHP development, we often need to convert a string into an array according to newline characters. In order to quickly implement this process, you can use the built-in functions explode() and preg_split(). The former is simple to use, but its performance is slightly lower than the latter. No matter which method is used, the process of converting a string into an array can be quickly and conveniently implemented.

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