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AkShay Mahajan
177 Pointscannot understand array_splice please explain
I tried to understand about array_splice but cannot. Explain the parameters required in array_splice.
3 Answers
Jon Maldia
8,473 PointsHi there, here's how I understand this.
array array_splice ( input , offset, length, replacement )
input - this is the array that you will be using to splice
offset - this is where you start to splice. If the number is positive, you start from the left. If it's negative, you start from the right.
length - if this is positive, this is how many values will be removed. if this is is negative, you count from the left up to the absolute number - that's where you stop removing. If it's 0, you don't remove anything, you basically add the replacement starting at the offset
replacement - if specified, this will be the value you will add to the array
Examples:
$input = array("apples", "oranges", "bananas", "cherries");
array_splice($input, 1);
// remove everything from $input[1] to the end of the array. The array is now array("apples")
$input = array("apples", "oranges", "bananas", "cherries");
array_splice($input, 1, -1);
// Remove everything from $input[1]. Then, you count 1 from the right ("cherries"). That's where you stop. You remove "oranges" and "bananas". The array is now array("apples", "cherries")
$input = array("apples", "oranges", "bananas", "cherries");
array_splice($input, -1, 1, array("watermelon", "mangoes"));
// Count from 1 from the right since the offset is negative. That's where you start. Then you remove 1 because length is one. You remove "cherries". Replace that with "watermelon" and "mangoes" from $input[3]. The array is now array("apples", "oranges", "bananas", "watermelon", "mangoes")
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Jon Maldia
8,473 PointsSorry. Yea, that should be cherries and not bananas. I fixed it.
somya shrivastava
1,431 Pointsthank you Jon :)
AkShay Mahajan
177 PointsAkShay Mahajan
177 PointsIn third example I think you did a small mistake. You said that we have to remove bananas but you removed cherries from $input.
Count from 1 from the right since the offset is negative. That's where you start. Then you remove 1 because length is one. You remove "bananas". Replace that with "watermelon" and "mangoes" from $input[3]. The array is now array("apples", "oranges", "bananas", "watermelon", "mangoes")
Please correct me if I am wrong.
nico dev
20,364 Pointsnico dev
20,364 PointsNow that helped a lot.
Thank you!