PHP - Testing If a Variable Is an Array in PHP

Testing If a Variable Is an Array in PHP

Q

How To Test If a Variable Is an Array in PHP?

✍: FYIcenter.com

A

Testing if a variable is an array is easy. Just use the is_array() function. Here is a PHP script on how to use is_array():

<?php 
$var = array(0,0,7);
print("Test 1: ". is_array($var)."\n");
$var = array();
print("Test 2: ". is_array($var)."\n");
$var = 1800;
print("Test 3: ". is_array($var)."\n");
$var = true;
print("Test 4: ". is_array($var)."\n");
$var = null;
print("Test 5: ". is_array($var)."\n");
$var = "PHP";
print("Test 6: ". is_array($var)."\n");
print("\n");
?>

This script will print:

Test 1: 1
Test 2: 1
Test 3:
Test 4:
Test 5:
Test 6:

⇒Understanding PHP Arrays and Their Basic Operations

⇒⇒PHP Tutorials

2016-10-15, 379👍, 0💬

Creating an Array in PHP
How To Create an Array in PHP? You can create an array using the array() constructor. When calling array(), you can also initialize the array with pairs of keys and values. Here is a PHP script on how to use array(): <?php print("Empty array:\n"); $emptyArray = array(); print_r($emptyArray); ... 2016-10-15, 384👍, 0💬

Testing If a Variable Is an Array in PHP
How To Test If a Variable Is an Array in PHP? Testing if a variable is an array is easy. Just use the is_array() function. Here is a PHP script on how to use is_array(): <?php $var = array(0,0,7); print("Test 1: ". is_array($var)."\n"); $var = array(); print("Test 2: ". is_array($var)."\n"); ... 2016-10-15, 380👍, 0💬

What Is an Array in PHP
What Is an Array in PHP? An array in PHP is really an ordered map of pairs of keys and values. Comparing with Perl, an array in PHP is not like a normal array in Perl. An array in PHP is like an associate array in Perl. But an array in PHP can work like a normal array in Perl. Comparing with Java, a... 2016-10-15, 369👍, 0💬

Retrieving Values out of an Array in PHP
How To Retrieve Values out of an Array in PHP? You can retrieve values out of arrays using the array element expression $array[$key]. Here is a PHP example script: <?php $languages = array(); $languages["Zero"] = "PHP"; $languages["One"] = "Perl"; $languages["Two"] = "Java"; print("Array with... 2016-10-15, 366👍, 0💬

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