How can i delete an element from an array without using built-in functions in php ? But php doesn't have any keyword like delete or remove in it. can anyone help me ?
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3No AFAIK you have to use unset() or array_splice(). What's the problem with using functions, exactly?ADyson– ADyson2021-09-30 08:10:08 +00:00Commented Sep 30, 2021 at 8:10
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No built-in functions should be used ?Naren– Naren2021-09-30 08:12:53 +00:00Commented Sep 30, 2021 at 8:12
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Why not, exactly? It doesn't really make sense. Just use the correct tool for the job. In this case, that's the ready-made function. Have you been given this as a homework or something?ADyson– ADyson2021-09-30 08:13:33 +00:00Commented Sep 30, 2021 at 8:13
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1Unset is the fastest way and this is a language construct and not a function ;)Robert– Robert2021-09-30 09:38:47 +00:00Commented Sep 30, 2021 at 9:38
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1 Answer
Okay so from what I can see there is no logical way to do this and why do you want to do this? PHP was built with these functions for a reason and that's why we all use them.
I recommend you use the following
- Use
unset()Function to Delete an Element From an Array in PHP - Use
array_splice()Function to Delete an Element From an Array in PHP - Use
array_diff()Function to Delete an Element From an Array in PHP
unset()
<?php
//Declare the array
$flowers = array(
"Rose",
"Lili",
"Jasmine",
"Hibiscus",
"Tulip",
"Sun Flower",
"Daffodil",
"Daisy");
unset($flowers[1]);
echo "The array is:\n";
print_r($flowers);
?>
This function can delete one value at a time. The name of the array along with the element index ($flowers[1]) is passed as a parameter. This function does not change the index values. The index values remain the same as they were before.
array_splice()
<?php
//Declare the array
$flowers = array(
"Rose",
"Lili",
"Jasmine",
"Hibiscus",
"Tulip",
"Sun Flower",
"Daffodil",
"Daisy");
array_splice($flowers, 4, 3);
echo "The array is:\n";
print_r($flowers);
?>
The array $flowers is passed as a parameter to this function along with the starting index 4 and the number of elements we want to delete-3. In this way, we can delete multiple elements from an array.
array_diff()
<?php
//Declare the array
$flowers = array(
"Rose",
"Lili",
"Jasmine",
"Hibiscus",
"Tulip",
"Sun Flower",
"Daffodil",
"Daisy");
$flowers = array_diff($flowers, array("Rose","Lili"));
echo "The array is:\n";
print_r($flowers);
?>
Here, the first array that we have passed is $flowers and the second array contains the elements that we want to delete from $flowers. This function does not change the indexes of the elements of the array.
