PHP Array Functions

PHP provides various array functions to access and manipulate the elements of array. The important PHP array functions are given below.

1) PHP array() function

PHP array() function creates and returns an array. It allows you to create indexed, associative and multidimensional arrays.

Syntax

snippet
array array ([ mixed $... ] )

Example

snippet

Output:

Output
Season are: summer, winter, spring and autumn

2) PHP array_change_key_case() function

PHP array_change_key_case() function changes the case of all key of an array.

Note: It changes case of key only.

Syntax

snippet
array array_change_key_case ( array $array [, int $case = CASE_LOWER ] )

Example

snippet
"550000","Vimal"=>"250000","Ratan"=>"200000");  
print_r(array_change_key_case($salary,CASE_UPPER)); 
?>

Output:

Output
Array ( [SONOO] => 550000 [VIMAL] => 250000 [RATAN] => 200000 )

Example

snippet
"550000","Vimal"=>"250000","Ratan"=>"200000");  
print_r(array_change_key_case($salary,CASE_LOWER)); 
?>

Output:

Output
Array ( [sonoo] => 550000 [vimal] => 250000 [ratan] => 200000 )

3) PHP array_chunk() function

PHP array_chunk() function splits array into chunks. By using array_chunk() method, you can divide array into many parts.

Syntax

snippet
array array_chunk ( array $array , int $size [, bool $preserve_keys = false ] )

Example

snippet
"550000","Vimal"=>"250000","Ratan"=>"200000");  
print_r(array_chunk($salary,2)); 
?>

Output:

Output
Array ( [0] => Array ( [0] => 550000 [1] => 250000 ) [1] => Array ( [0] => 200000 ) )

4) PHP count() function

PHP count() function counts all elements in an array.

Syntax

snippet
int count ( mixed $array_or_countable [, int $mode = COUNT_NORMAL ] )

Example

snippet

Output:

Output
4

5) PHP sort() function

PHP sort() function sorts all the elements in an array.

Syntax

snippet
bool sort ( array &$array [, int $sort_flags = SORT_REGULAR ] )

Example

snippet
";  
}  
?>

Output:

Output
autumn spring summer winter

6) PHP array_reverse() function

PHP array_reverse() function returns an array containing elements in reversed order.

Syntax

snippet
array array_reverse ( array $array [, bool $preserve_keys = false ] )

Example

snippet
";  
}  
?>

Output:

Output
autumn spring winter summer

7) PHP array_search() function

PHP array_search() function searches the specified value in an array. It returns key if search is successful.

Syntax

snippet
mixed array_search ( mixed $needle , array $haystack [, bool $strict = false ] )

Example

snippet

Output:

Output
2

8) PHP array_intersect() function

PHP array_intersect() function returns the intersection of two array. In other words, it returns the matching elements of two array.

Syntax

snippet
array array_intersect ( array $array1 , array $array2 [, array $... ] )

Example

snippet
";  
}  
?>

Output:

Output
sonoo smith
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