How to convert string to array in php

In PHP, converting a string to an array is a very basic operation. This operation can be implemented according to different needs and requirements, such as splitting a string with a certain character, or splitting a string with certain rules. Let's take a look at how to convert a string to an array in PHP.

1. Use the explode() method

The explode() function in PHP is one of the standard methods to convert a string into an array. Its usage is as follows:

explode(分隔符,字符串)

where the delimiter is the position to be split in the string. For example, the following example:

$str = "php,java,c++,python";
$arr = explode(",", $str);
print_r($arr);

Run result:

Array ( [0] => php [1] => java [2] => c++ [3] => python )

In the above example, we define a comma-delimited string $str, and then use the explode() function to follow the commas Position split it into an array. Finally, use the print_r() function to output the results.

2. Use the sscanf() method

The sscanf() function in PHP can also convert a string into an array:

sscanf(字符串,格式,%param1%,[%param2%],……)

Among them, the parameter format describes the string The format in, %param1%, [%param2%],... means that the matched part of the string is to be returned to the variable. For example, the following example:

$str = "abc12def23ghi999jkl";
sscanf($str, "%[a-z]%d%[a-z]%d%[a-z]%d%[a-z]", $a, $b, $c, $d, $e, $f);
echo $a, $b, $c, $d, $e, $f;

Output result:

abc12def23ghi999jkl

In the above example, we defined a string $str, which contains some letters and numbers, using the sscanf() function , we stored letters and numbers in variables $a, $b, $c, $d, $e, $f respectively, and output the entire string.

3. Use the preg_split() method

The preg_split() function in PHP can use regular expressions to split strings, making string splitting more flexible. For example, the following example:

$str = "php,java,c++,python";
$arr = preg_split("/[,\.]/", $str);
print_r($arr);

Running result:

Array ( [0] => php [1] => java [2] => c++ [3] => python )

In the above example, we define a string $str separated by commas and periods, and then use the preg_split() method according to Regularly use "/[,.]/" to split it into arrays, and finally use the print_r() function to output the result.

Conclusion

Converting a string to an array in PHP is a very basic operation, and there are many ways to implement it, such as using explode(), sscanf() or preg_split() and other methods. We can choose the most suitable method to convert string to array according to our own needs and requirements.

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