What are the ways to split a string into an array in php

The methods are: 1. The explode() function can split the string into an array according to the specified delimiter; 2. The str_split() function can split the string into an array of single characters; 3. , preg_split() function, which can split the string into an array according to the regular expression; 4. sscanf() function, which can parse the string according to the specified format and store the parsing result in the array; 5. String interception method , by using the string interception function, the string can be split into arrays according to the specified length, etc.

Operating system for this tutorial: Windows 10 system, PHP8.1.3 version, Dell G3 computer.

In PHP, there are many ways to split a string into an array. The following are some common methods:

1. The explode() function: The explode() function can split a string into an array according to the specified delimiter. Its syntax is as follows:

explode(separator, string, limit)

Among them, separator is the separator, string is the string to be split, and limit is an optional parameter, indicating the maximum number of splits. This function returns an array containing the split substrings.

Sample code:

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

Output result:

Array
(
    [0] => apple
    [1] => banana
    [2] => orange
)

2. str_split() function: str_split() function can split the string into Array of single characters. Its syntax is as follows:

str_split(string, length)

Among them, string is the string to be split, length is an optional parameter, indicating the length of each element. This function returns an array containing the split characters.

Sample code:

$str = "hello";
$arr = str_split($str);
print_r($arr);

Output result:

Array
(
    [0] => h
    [1] => e
    [2] => l
    [3] => l
    [4] => o
)

3. preg_split() function: preg_split() function can divide characters according to regular expressions Split the string into an array. Its syntax is as follows:

preg_split(pattern, subject, limit, flags)

Among them, pattern is a regular expression, subject is the string to be split, limit is an optional parameter, indicating the maximum number of splits, flags is an optional parameter, indicating regular Modifiers for expressions. This function returns an array containing the split substrings.

Sample code:

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

Output result:

Array
(
    [0] => apple
    [1] => banana
    [2] => orange
)

4. sscanf() function: sscanf() function can parse characters according to the specified format string and store the parsed results in an array. Its syntax is as follows:

sscanf(string, format, var1, var2, ...)

Among them, string is the string to be parsed, format is the parsing format, and var1, var2, etc. are variables to store the parsing results. This function will return the number of successfully parsed parameters.

Sample code:

$str = "apple,banana,orange";
sscanf($str, "%s,%s,%s", $fruit1, $fruit2, $fruit3);
echo $fruit1; // apple
echo $fruit2; // banana
echo $fruit3; // orange

Output result:

apple
banana
orange

5. String interception method: By using string interception function, such as substr() , mb_substr(), etc., can split the string into an array according to the specified length. Sample code:

$str = "hello";
$arr = str_split($str, 2);
print_r($arr);

Output result:

Array
(
    [0] => he
    [1] => ll
    [2] => o
)

The above are some common methods of splitting strings into arrays. Depending on your specific needs and the format of the string, you can choose a suitable method to achieve string splitting.

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