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PHP : functions related to arrays

Arrays

All functions related to arrays are in here

array

Creates an array. Read the section on the array type for more information on what an array is.

array_change_key_case

Changes all keys in an array

array_chunk

Split an array into chunks

array_combine

Creates an array by using one array for keys and another for its values

array_count_values

Counts all the values of an array

array_diff

Computes the difference of arrays

array_diff_assoc

Computes the difference of arrays with additional index check.

array_diff_key

Computes the difference of arrays using keys for comparison

array_diff_uassoc

Computes the difference of arrays with additional index check which is performed by a user supplied callback function.

array_diff_ukey

Computes the difference of arrays using a callback function on the keys for comparison.

array_fill

Fills an array with num entries of the value of the value parameter, keys starting at the start_index parameter.

array_fill_keys

Fill an array with values, specifying keys

array_filter

Filters elements of an array using a callback function.

array_flip

Exchanges all keys with their associated values in an array.

array_intersect

Computes the intersection of arrays.

array_intersect_assoc

array_intersect_assoc

array_intersect_key

Computes the intersection of arrays using keys for comparison

array_intersect_uassoc

Computes the intersection of arrays with additional index check, compares indexes by a callback function

array_intersect_ukey

Computes the intersection of arrays using a callback function on the keys for comparison.

array_keys

Return all the keys or a subset of the keys of an array

array_key_exists

Checks if the given key or index exists in the array.

array_map

Applies the callback to the elements of the given arrays

array_merge

Merge one or more arrays

array_merge_recursive

Merge two or more arrays recursively

array_multisort

Sort multiple or multi-dimensional arrays

array_pad

Pad array to the specified length with a value

array_pop

Pop the element off the end of array

array_product

Calculate the product of values in an array

array_push

Push one or more elements onto the end of array

array_rand

Pick one or more random entries out of an array

array_reduce

Iteratively reduce the array to a single value using a callback function

array_replace

Replaces elements from passed arrays into the first array

array_replace_recursive

Replaces elements from passed arrays into the first array recursively

array_reverse

Return an array with elements in reverse order

array_search

Searches the array for a given value and returns the corresponding key if successful

array_shift

Shift an element off the beginning of array

array_slice

Extract a slice of the array

array_splice

Remove a portion of the array and replace it with something else

array_sum

Calculate the sum of values in an array

array_udiff

Computes the difference of arrays by using a callback function for data comparison

array_udiff_assoc

Computes the difference of arrays with additional index check, compares data by a callback function

array_udiff_uassoc

Computes the difference of arrays with additional index check, compares data and indexes by a callback function

array_uintersect

Computes the intersection of arrays, compares data by a callback function

array_uintersect_assoc

Computes the intersection of arrays with additional index check, compares data by a callback function

array_uintersect_uassoc

Computes the intersection of arrays with additional index check, compares data and indexes by a callback functions

array_unique

Removes duplicate values from an array

array_unshift

Prepend one or more elements to the beginning of an array

array_walk

Apply a user function to every member of an array

array_walk_recursive

Apply a user function recursively to every member of an array

arsort

Sort an array in reverse order and maintain index association

asort

Sort an array and maintain index association

count

Counts all elements in an array, or something in an object.

current

Return the current element in an array

each

Return the current key and value pair from an array and advance the array cursor

end

Set the internal pointer of an array to its last element

explode

Split a string by string

implode

Join array elements with a string

in_array

Checks if a value exists in an array

is_array

Finds whether a variable is an array

join

Alias of implode()

key

Fetch a key from an array

krsort

Sort an array by key in reverse order

ksort

Sort an array by key

max

Find highest value

min

Find lowest value

natcasesort

Sort an array using a case insensitive “natural order” algorithm

natsort

Sort an array using a “natural order” algorithm

next

Advance the internal array pointer of an array

prev

Rewind the internal array pointer

print_r

print_r() displays information about a variable in a way that’s readable by humans.

reset

Set the internal pointer of an array to its first element

rewind

Rewind the position of a file pointer

rsort

Sort an array in reverse order

serialize

Generates a storable representation of a value. Execute it online with array support!

shuffle

Shuffle an array

sizeof

Alias of count()

sort

Sort an array

split

Split string into array by regular expression

spliti

Split string into array by regular expression case insensitive

uasort

Sort an array with a user-defined comparison function and maintain index association

uksort

Sort an array by keys using a user-defined comparison function

unserialize

Unserialize() takes a single serialized variable and converts it back into a PHP value.

usort

Sort an array by values using a user-defined comparison function

PHP: remove last character from string




rtrim($string, ",") //Remove comma from right side

 

trim($string, ",") // Remove comma from both side

 

 

//  Output 

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Get user IP address in PHP

function get_client_ip() {
$ipaddress = ”;
if (getenv(‘HTTP_CLIENT_IP’))
$ipaddress = getenv(‘HTTP_CLIENT_IP’);
else if(getenv(‘HTTP_X_FORWARDED_FOR’))
$ipaddress = getenv(‘HTTP_X_FORWARDED_FOR’);
else if(getenv(‘HTTP_X_FORWARDED’))
$ipaddress = getenv(‘HTTP_X_FORWARDED’);
else if(getenv(‘HTTP_FORWARDED_FOR’))
$ipaddress = getenv(‘HTTP_FORWARDED_FOR’);
else if(getenv(‘HTTP_FORWARDED’))
$ipaddress = getenv(‘HTTP_FORWARDED’);
else if(getenv(‘REMOTE_ADDR’))
$ipaddress = getenv(‘REMOTE_ADDR’);
else
$ipaddress = ‘UNKNOWN’;
return $ipaddress;
}

$ip = get_client_ip();