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Let's say i have this array:
$array = (1,2,4,5);
Now how do i add missing 3 in above array in the correct position index/key-wise?
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First get the element to be inserted, say x. Then get the position at which this element is to be inserted, say pos. Then shift the array elements from this position to one position forward(towards right), and do this for all the other elements next to pos.
When you want to add an element to the end of your array, use push(). If you need to add an element to the beginning of your array, try unshift(). And you can add arrays together using concat().
The array_keys() is a built-in function in PHP and is used to return either all the keys of and array or the subset of the keys. Parameters: The function takes three parameters out of which one is mandatory and other two are optional.
Given two array arr1 and arr2 and the task is to append one array to another array. Using array_merge function: This function returns a new array after merging the two arrays. $arr1 = array ( "Geeks" , "g4g" ); $arr2 = array ( "GeeksforGeeks" , "Computer science portal" );
Try:
array_splice($array, 2 /*offset*/, 0 /*length*/, 3 /*value*/);
Note that this will reorder the input array's keys from 0 to n-1.
(Edit: The return value is not used in this case.)
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