PHP explode()Functions

PHP String 参考手册PHP String Reference Manual

Examples

Split the string by the specified delimiter.into an array:

<?php $str = "www.example.com"; print_r (explode(".",$str)); ?>

Run example »

Output:

Array
(
    [0] => www
    [1] => example
    [2] => com
)

Definition and Usage

explode() is a PHP function used to split a string into an array by a specified delimiter.

explode() is commonly used to process strings containing multiple values, breaking them into an array so that the individual parts can be more easily manipulated and accessed.

Note:The "separator" parameter cannot be an empty string.

Note:This function is binary-safe.

Syntax

explode(string $separator, string $string, int $limit = PHP_INT_MAX): array

Parameter description:

  • $separator: Separator, specifies the character or string used to split the string. This separator will act as the cutting point in the string.
  • $string: The original string to be split.
  • $limit(Optional): Specifies the maximum number of elements in the returned array. If given$limit, the returned array will contain at most$limitelements, with the last element containing all the remaining content. If not specified, the default value isPHP_INT_MAX, meaning no limit.

Return Value

Returns an array containing the parts separated by the delimiter.

Technical Details

Return Value: Returns an array of strings.
PHP Version: 4+
Changelog: In PHP 4.0.1, thelimitparameter was added. In PHP 5.1.0, support for negativelimitswas added.

More Examples

Example 1

Use the limit parameter to return some array elements:

<?php $str = 'one,two,three,four'; //Returns an array containing one element print_r(explode(',',$str,0)); print "<br>"; //Array has 2 elements print_r(explode(',',$str,2)); print "<br>"; //Remove the last array element print_r(explode(',',$str,-1)); ?>

Run example »

Output:

Array
(
    [0] => one,two,three,four
)

Array
(
    [0] => one
    [1] => two,three,four
)

Array
(
    [0] => one
    [1] => two
    [2] => three
)

Limit the number of returned array elements:

Example

$str = "apple,banana,cherry,orange";
$arr = explode(",", $str, 3);
print_r($arr);

Output:

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

When there is no delimiter:

Example

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

Output:

Array
(
    [0] => apple
)

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