I'm not sure how much overhead all the function invocation introduces.
Foreach php with key code#
Although, you might want to benchmark the gist code if you're super concerned about efficiency. If you wanted to functionalize this kind of thing, I've taken a swing at such an iterateList function here. This loop only works with arrays and you do not have to initialise any loop counter. First parameter must be existing array name which elements or key you want to. The foreach loop in PHP is used to access key-value pairs of an array. I haven't done benchmarking on this, but no logic has been added to the loop, which is were the biggest hit to performance happens, so I'd suspect that the benchmarks provided with the efficient answer are pretty close. You can define two parameter inside foreach separated through as keyword. # Special handling of the last item goes here # Special handling of the first item goes here The array_keys function can be used to make the efficient answer work like foreach: $keys = array_keys($arr) This answer avoids the overhead of a conditional statement for every iteration of the loop, as in most of these answers (including the accepted answer) by specifically handling the first and last element, and looping over the middle elements.
If the last element is reached, PHP ends the loop. Example 3: In this case, an array of students and their marks are taken in the array. The most efficient answer from unlike foreach, only works for proper arrays, not hash map objects. In each iteration, PHP assigns the key and value of the next element to the variables ( key and value) that follows the as keyword. Using the foreach loop with Key-Value pairs: We will use the same foreach loop to iterate over an array of key-value pairs.
Your page could be made a lot more readable and maintainable by separating things like this: įoreach($subcat as $val) show_subcat($val) You could also avoid mixing HTML with php logic whenever possible. Removing all the formatting to CSS instead of inline tags would improve your code and speed up load time. You could remove the first and last elements off the array and process them separately.
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