• Php Create Multidimensional Array Key Value
• Php Array Push Key Value
• Php Foreach Create Array Key Value
• Php Array Add Key Value
• Php Key In Array

Nov 21, 2019  php search multidimensional array by key and value. Here we will learn how to search in the multidimensional array for value and return key. Also learn how to search multidimensional array for key and return value. Sometimes we need to search in an array or multidimensional array by key or value without using any function. Jun 21, 2019  PHP - Generate all the possible combinations among a set of nested arrays. combos.php.

• As shuffle permanently change the keys of an array. Method 2: Use arrayrand function to get random value out of an array in PHP. PHP arrayrand Function: The arrayrand function is an inbuilt function in PHP which is used to fetch a random number of elements from an array. The element is a key and can return one or more than one key.
• PHP deleting elements of an array by unset ( key or value ) We can remove an element from an array by using unset command. However unset command is used to destroy any other variable and same way we can use delete any element of an array. This unset command takes the array key as input and removed that element from the array.

What is a PHP Array?

A PHP array is a variable that stores more than one piece of related data in a single variable.

Think of an array as a box of chocolates with slots inside.

The box represents the array itself while the spaces containing chocolates represent the values stored in the arrays.

The diagram below illustrates the above syntax.

In this tutorial, you will learn-

Numeric Arrays

Numeric arrays use number as access keys.

An access key is a reference to a memory slot in an array variable.

The access key is used whenever we want to read or assign a new value an array element.

Below is the syntax for creating numeric array in php. Array Example

Or

HERE,

• “$variable_name…” is the name of the variable
• “[n]” is the access index number of the element
• “value” is the value assigned to the array element.

Let’s now look at an example of a numeric array.

Suppose we have 5 movies that we want to store in array variables.

We can use the example shown below to do that.

Here,

Each movie is given an index number that is used to retrieve or modify its value. Observe the following code-

Output:

As you can see from the above examples, working with arrays in PHP when dealing with multiple values of the same nature is very easy and flexible.

Alternatively, the above array variables can also be created using the following code.

Output:

PHP Associative Array

Associative array differ from numeric array in the sense that associative arrays use descriptive names for id keys.

Below is the syntax for creating associative array in php.

HERE,

• “$variable_name…” is the name of the variable
• “['key_name']” is the access index number of the element
• “value” is the value assigned to the array element.

Let’s suppose that we have a group of persons, and we want to assign the gender of each person against their names.

We can use an associative array to do that.The code below helps us to do that.

HERE,

Output:

Associative array are also very useful when retrieving data from the database.

The field names are used as id keys.

PHP Multi-dimensional arrays

These are arrays that contain other nested arrays.

The advantage of multidimensional arrays is that they allow us to group related data together.

Let’s now look at a practical example that implements a php multidimensional array.

The table below shows a list of movies by category.

Php Create Multidimensional Array Key Value

Movie title	Category
Pink Panther	Comedy
John English	Comedy
Die Hard	Action
Expendables	Action
The Lord of the rings	Epic
Romeo and Juliet	Romance
See no evil hear no evil	Comedy

The above information can be represented as a multidimensional array. The code below shows the implementation.

HERE,

Output:

Another way to define the same array is as follows

Php Array Push Key Value

Output:

Note: the movies numeric array has been nested inside the categories associative array

PHP Arrays: Operators

Operator	Name	Description	How to do it	Output
x + y	Union	Combines elements from both arrays	Array([id] => 1 [value] => 10)
X y	Equal	Compares two arrays if they are equal and returns true if yes.	True or 1
X y	Identical	Compares both the values and data types	False or 0
X != y, x <> y	Not equal	False or 0
X ! y	Non identical	True or 1

PHP Array Functions

Count function

The count function is used to count the number of elements that an php array contains. The code below shows the implementation.

Output:

is_array function

The is_array function is used to determine if a variable is an array or not. Let’s now look at an example that implements the is_array functions.

Output:

Sort

This function is used to sort arrays by the values.

If the values are alphanumeric, it sorts them in alphabetical order.

If the values are numeric, it sorts them in ascending order. Little snitch 4.0 4 crack.

It removes the existing access keys and add new numeric keys.

Php Foreach Create Array Key Value

The output of this function is a numeric array

Output:

ksort

This function is used to sort the array using the key. The following example illustrates its usage.

Output:

asort

This function is used to sort the array using the values. The following example illustrates its usage.

Output:

Why use arrays?

Php Array Add Key Value

• Contents of Arrays can be stretched,
• Arrays easily help group related information such as server login details together
• Arrays help write cleaner code.

Summary

Php Key In Array

• Arrays are special variables with the capacity to store multi values.
• Arrays are flexibility and can be easily stretched to accommodate more values
• Numeric arrays use numbers for the array keys
• PHP Associative array use descriptive names for array keys
• Multidimensional arrays contain other arrays inside them.
• The count function is used to get the number of items that have been stored in an array
• The is_array function is used to determine whether a variable is a valid array or not.
• Other array functions include sort, ksort, assort etc.