Detailed explanation of the application of explode() function in php

In

php, theexplode() function splits thestringinto an array. Its return value is an array composed of strings, each element of which is a substring separated by separator as a boundary point. This article introduces the detailed application of explode() function in PHP!

explode() function introduction

explode() function can split a string into an array.

Syntax:

explode(separator,string,limit)。

separator, required. Specifies where to split the string.

string, required. The string to split.

limit, optional. Specifies the maximum number of array elements returned.

This function returns an array composed of strings, each element of which is a substring separated by separator as a boundary point.

separator parameter cannot be an empty string. If separator is the empty string (""), explode() returns FALSE. If separator contains a value that is not found in string, explode() returns an array containing a single element from string.

If the limit parameter is set, the returned array contains at most limit elements, and the last element will contain the remainder of the string.

If the limit parameter is a negative number, all elements except the last -limit elements are returned. This feature is new in PHP 5.1.0.

Program List: explode() example

01 

Program operation result:

1 Apple 2 Banana 3 gonn 4 *

Program List: explode() using limit parameter Example

1 

Program running result:

01 Array 02 ( 03 [0] => one 04 [1] => two|three|four 05 ) 06 Array 07 ( 08 [0] => one 09 [1] => two 10 [2] => three 11 )

Program List: Convert string into key value array

01 ') { 04 if ($a = explode($delimiter, $string)) { // create parts 05 foreach ($a as $s) { // each part 06 if ($s) { 07 if ($pos = strpos($s, $kv)) { // key/value delimiter 08 $ka[trim(substr($s, 0, $pos))] = trim(substr($s, $pos + strlen($kv))); 09 } else { // key delimiter not found 10 $ka[] = trim($s); 11 } 12 } 13 } 14 return $ka; 15 } 16 } // string2KeyedArray 17 $string = 'a=>1, b=>23, $a, c=>45%, true, d=>ab c'; 18 print_r(string2KeyedArray($string)); 19 ?>

Program running result:

1 Array 2 ( 3 [a] => 1 4 [b] => 23 5 [0] => $a 6 [c] => 45% 7 [1] => true 8 [d] => ab c 9 )

Summary:

This article uses several examples to introduce the application of the explode() function in php in detail, making it more intuitive for everyone Better understanding! Hope it helps with your work!

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