PHP array and string conversion implementation method _ PHP Tutorial-php Tutorial

PHP array and string conversion implementation method. The copy code is as follows: $ arrayexplode (separator, $ string); $ stringimplode (glue, $ array); the key to using and understanding these two functions is the separator (separator) and Binder (g The code is as follows:

$ Array = explode (separator, $ string );
$ String = implode (glue, $ array );

The key to using and understanding these two functions is the relationship between the separator and glue. When an array is converted into a string, the delimiter is set-the character or code that is inserted into the array value in the generated string.

On the contrary, when you convert a string into an array, you must specify a delimiter to mark what should be converted into an independent array element. For example, start with a string:

$ S1 = 'mon-Tue-Wed-Thu-fri ';
$ Days_array = explode ('-', $ s1 );
The $ days_array variable is now an array with five elements. the Mon index of the element is 0, and the Tue index is 1.
$ S2 = implode (',', $ days_array );
$ S2
Variables are now a list of days in a week separated by commas: Mon, Tue, Wed, Thu, Fri

Example 1. explode () example

The code is as follows:

// Example 1
$ Pizza = "piece1 piece2 piece3 piece4 piece5 piece6 ";
$ Pieces = explode ("", $ pizza );
Echo $ pieces [0]; // piece1
Echo $ pieces [1]; // piece2
// Example 2
$ Data = "foo: *: 1023: 1000:/home/foo:/bin/sh ";
List ($ user, $ pass, $ uid, $ gid, $ gecos, $ home, $ shell) = explode (":", $ data );
Echo $ user; // foo
Echo $ pass ;//*
?>

Example 2. limit parameter example

The code is as follows:

$ Str = 'one | two | three | four ';
// Positive limit
Print_r (explode ('|', $ str, 2 ));
// Negative limit
Print_r (explode ('|', $ str,-1 ));
?>

The above example will be output:
Array
(
[0] => one
[1] => two | three | four
)
Array
(
[0] => one
[1] => two
[2] => three
)

Note: This function can be safely used for binary objects.

The http://www.bkjia.com/PHPjc/326701.htmlwww.bkjia.comtruehttp://www.bkjia.com/PHPjc/326701.htmlTechArticle code is as follows: $ array = explode (separator, $ string); $ string = implode (glue, $ array); the key to using and understanding these two functions is the separator (separator) and adhesive (g...