Let’s talk about how to use the split() function in php

In PHP, the split() function is used to split a string according to the specified delimiter and return an array composed of the cutting results. This function is available in PHP 4 and PHP 5. It is recommended not to continue using this function.

In the split() function, comma is one of the characters that can be used as a delimiter. Here are some examples of using commas as delimiters:

1. Split strings by commas

Suppose there is a string $str, which contains multiple commas Separated values. Then you can use the following code to split these values ​​into an array:

$str = "1,2,3,4,5";
$arr = split(",", $str);

Here, the first parameter is the delimiter, and the second parameter is the string to be cut. $arr will contain the split array: array(1, 2, 3, 4, 5).

2. Split the key-value pairs in the string

Assuming that the string $str is a comma-separated key-value pair, you can use the following code to split the key-value pair into An associative array:

$str = "name=John,age=30,city=New York";
$arr = split(",", $str);
$info = array();
foreach ($arr as $key => $value) {
  list($k, $v) = split("=", $value);
  $info[$k] = $v;
}

Two split() functions are used here. The first function is used to split the string $str, and the second function is used to split key-value pairs. The keys and values ​​are assigned to variables $k and $v using list() and stored in the associative array $info. Ultimately, the $info variable will contain three elements: name, age, and city.

Summary

Although the split() function is useful in many situations, since it has been marked as an "obsolete" function, it is recommended to use the preg_split() function instead when writing new code . If you are maintaining old code and need to continue using the split() function, please ensure that the code is running on a reliable PHP version and promptly update the unsupported features in the processing logic.

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