PHP array

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  An array stores multiple values in one single variable. In PHP, the array() function is used to create an array. Example: <?php $pets = array ( "dog" , "cat" , "rabbit" ); echo $pets [ 0 ] . "," . $pets [ 1 ] . "," . $pets [ 2 ]; ?> Output: dog,cat,rabbit An array is a special variable, which can hold more than one value at a time. If you have a list of student names, storing the names in single variables could like this, $name1 = "Peter" $name2 = "Mickle" $name2 = "Bravo" However, what if you want to loop through the names and find a specific one? And what if you had 3 names, but 1000? The solution is to create an array . An array can hold many values under a single name, and you can access the values by referring to an index number. There are three different kind of arrays. Numeric array – Arrays with a numeric index Associative array – Arrays with named keys
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PHP explode function

PHP explode function

In this post, you’ll learn how to use the PHP explode() function.

PHP explode() function returns an array of strings by splitting a string by a separator. The following shows the syntax of the PHP explode() function.

Syntax:
	explode(separator, string, limit)
  • separator - Required. Specifies where to break the string
  • string – Required. The string to split
  • limit – Optional. Specifies the number of array elements to return
    Possible Values
    • Greater than 0 - Returns an array with a maximum of limit element(s)
    • Less than 0 - Returns an array except for the last -limit element(s)
    • 0 - Returns an array with one element
Example:
<?php 
$txt = "Welcome to PHP Coding Help.";
print_r (explode(" ",$txt));
?>
Output:

Array ( [0] => Welcome [1] => to [2] => PHP [3] => Coding [4] => Help. )

Using the limit parameter to return a number of array elements:

Example:
<?php 
$str = 'red,blue,yellow,green';

// zero limit
print_r(explode(',',$str,0));
print "<br>";

// positive limit
print_r(explode(',',$str,2));
print "<br>";

// negative limit 
print_r(explode(',',$str,-1));
?>
Output:

Array ( [0] => red,blue,yellow,green )
Array ( [0] => red [1] => blue,yellow,green )
Array ( [0] => red [1] => blue [2] => yellow )

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