How To Get All the Keys Out of an Array

Q

How To Get All the Keys Out of an Array? - PHP Script Tips - PHP Built-in Functions for Arrays

✍: FYIcenter.com

A

Function array_keys() returns a new array that contains all the keys of a given array. Here is a PHP script on how to use array_keys():

<?php 
$mixed = array();
$mixed["Zero"] = "PHP";
$mixed[1] = "Perl";
$mixed["Two"] = "Java";
$mixed["3"] = "C+";
$mixed[""] = "Basic";
$mixed[] = "Pascal";
$mixed[] = "FORTRAN";
$keys = array_keys($mixed);
print("Keys of the input array:\n");
print_r($keys);
?>

This script will print:

Keys of the input array:
Array
(
    [0] => Zero
    [1] => 1
    [2] => Two
    [3] => 3
    [4] =>
    [5] => 4
    [6] => 5
)

2007-04-21, 5345👍, 0💬

How To Join a List of Keys with a List of Values into an Array
How To Join a List of Keys with a List of Values into an Array? - PHP Script Tips - PHP Built-in Functions for Arrays If you have a list keys and a list of values stored separately in two arrays, you can join them into a single array using the array_combine() function. It will make the values of the... 2007-04-21, 7249👍, 0💬

How To Sort an Array by Values
How To Sort an Array by Values? - PHP Script Tips - PHP Built-in Functions for Arrays Sorting an array by values is doable by using the sort() function. It will re-order all pairs of keys and values based on the alphanumeric order of the values. Then it will replace all keys with integer keys sequen... 2007-04-21, 5930👍, 0💬

How To Sort an Array by Keys
How To Sort an Array by Keys? - PHP Script Tips - PHP Built-in Functions for Arrays Sorting an array by keys can be done by using the ksort() function. It will re-order all pairs of keys and values based on the alphanumeric order of the keys. Here is a PHP script on how to use ksort(): <?php ... 2007-04-21, 5564👍, 0💬

How To Copy Array Values to a List of Variables
How To Copy Array Values to a List of Variables? - PHP Script Tips - Understanding PHP Arrays and Their Basic Operations If you want copy all values of an array to a list of variable, you can use the list() construct on the left side of an assignment operator. list() will only take values with integ... 2007-04-20, 5398👍, 0💬

How To Find a Specific Value in an Array
How To Find a Specific Value in an Array? - PHP Script Tips - PHP Built-in Functions for Arrays There are two functions can be used to test if a value is defined in an array or not: array_search($value, $array) - Returns the first key of the matching value in the array, if found. Otherwise, it retur... 2007-04-20, 5381👍, 0💬

How To Get All the Keys Out of an Array
How To Get All the Keys Out of an Array? - PHP Script Tips - PHP Built-in Functions for Arrays Function array_keys() returns a new array that contains all the keys of a given array. Here is a PHP script on how to use array_keys(): <?php $mixed = array(); $mixed["Zero"] = "PHP"; $mixed[1] = "P... 2007-04-21, 5346👍, 0💬

How Do You If a Key Is Defined in an Array
How Do You If a Key Is Defined in an Array? - PHP Script Tips - PHP Built-in Functions for Arrays There are two functions can be used to test if a key is defined in an array or not: array_key_exists($key, $array) - Returns true if the $key is defined in $array. isset($array[$key]) - Returns true if ... 2007-04-20, 5323👍, 0💬

How To Get the Total Number of Values in an Array
How To Get the Total Number of Values in an Array? - PHP Script Tips - PHP Built-in Functions for Arrays You can get the total number of values in an array by using the count() function. Here is a PHP example script: <?php $array = array("PHP", "Perl", "Java"); print_r("Size 1: ".count($array... 2007-04-20, 5318👍, 0💬

How To Get All the Values Out of an Array
How To Get All the Values Out of an Array? - PHP Script Tips - PHP Built-in Functions for Arrays Function array_values() returns a new array that contains all the keys of a given array. Here is a PHP script on how to use array_values(): <?php $mixed = array(); $mixed["Zero"] = "PHP"; $mixed[1... 2007-04-21, 5206👍, 0💬

All rights in the contents of this web site are reserved by the individual author. fyicenter.com does not guarantee the truthfulness, accuracy, or reliability of any contents.