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5 ways to define array in php
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Arrays are the kings of advanced data structures in PHP. PHP arrays are extremely flexible—they allow numeric, auto-incremented keys, alphanumeric keys or a mix of both, and are capable of storing practically any value, including other arrays.
All arrays are ordered collections of items, called elements. Each element has a value and is identified by a key that is unique to the array it belongs to. As I mentioned in the previous line, keys can be either integer numbers or strings of arbitrary length.
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- 4 life savings php array function for web developers.
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So, lets have a look 5 ways to define array in php.
- Define an empty array.
$my_array_1 = array();
- Define an auto incremented indexed array.
$my_array_2 = array("elem_1","elem_2","elem_3");
- Define an array with assigned index(number)
$my_array_3 = array(
1=>"elem_1",
2=>"elem_2",
3=>"elem_3"
);
- Define an array with assigned index(string)
$my_array_4 = array(
"name"=>"my_name",
"age"=>20,
"sex" =>"male"
);
- Define a multidimensional array:
$multi_dim_array = array();
$multi_dim_array[] = array("elem_1","elem_2");
$multi_dim_array[] = array("elem_3","elem_4");
echo $multi_dim_array[0][1];
echo $multi_dim_array[1][0];
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Arrays are the kings of advanced data structures in PHP. PHP arrays are extremely flexible—they allow numeric, auto-incremented keys, alphanumeric keys or a mix of both, and are capable of storing practically any value, including other arrays.
All arrays are ordered collections of items, called elements. Each element has a value and is identified by a key that is unique to the array it belongs to. As I mentioned in the previous line, keys can be either integer numbers or strings of arbitrary length.
You may like also following array posts:
- 4 life savings php array function for web developers.
- How to sort multidimensional array in PHP.
So, lets have a look 5 ways to define array in php.
- Define an empty array.
$my_array_1 = array();
- Define an auto incremented indexed array.
$my_array_2 = array("elem_1","elem_2","elem_3");
- Define an array with assigned index(number)
$my_array_3 = array( 1=>"elem_1", 2=>"elem_2", 3=>"elem_3" );
- Define an array with assigned index(string)
$my_array_4 = array( "name"=>"my_name", "age"=>20, "sex" =>"male" );
- Define a multidimensional array:
$multi_dim_array = array();
$multi_dim_array[] = array("elem_1","elem_2");
$multi_dim_array[] = array("elem_3","elem_4");
echo $multi_dim_array[0][1];
echo $multi_dim_array[1][0];
Was this information useful? What other tips would you like to read about in the future? Share your comments, feedback and experiences with us by commenting below!
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