How to convert array type in php string

In the process of programming in PHP language, it is often necessary to convert string type data into array type. This is one of the more commonly used operations in PHP. Let's learn how to convert string type data into array type data.

1. Use the explode function

The explode() function is a string function that comes with PHP. Its function is to split the string according to the specified delimiter and then The string is stored in the array. Therefore, you can use the explode() function to convert a string into an array. For example:

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

The above code splits the comma-separated string $str according to commas, and obtains an array $arr containing the comma-separated data in the string. Through this method, you can easily convert strings separated by specific delimiters into array type data.

2. Use the preg_split function

In addition to using the built-in explode() function to convert strings to arrays, you can also use PHP's preg_split() function to complete the same operation. The preg_split() function supports regular expressions and can be more flexibly compatible with different string formats. For example:

$str = "apple,banana,orange";
$arr = preg_split("/,/", $str);

The above code uses the preg_split() function to split and convert a comma-separated string into array type data. It should be noted that the delimiter parameter accepted by the preg_split() function needs to be expressed using regular expressions, so as to achieve compatibility with different format strings.

3. Use the json_decode function

In addition to using the preg_split() and explode() functions to convert strings to arrays, you can also use the json_decode() function to achieve the same effect. This method requires converting the string into JSON format and then decoding it. The result is an array data type. For example:

$str = '["apple", "banana", "orange"]';
$arr = json_decode($str);

$str in the above code is a string in JSON format, which is converted into array type data $arr containing three elements through the json_decode() function.

Summary

The above are three methods of converting string type data into array type data in PHP programming: using the explode() function, using the preg_split() function and using json_decode( )function. Each of the three methods has different characteristics and applicable situations. Choosing the appropriate method can better help us complete our programming tasks.

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