Php recursive loop through multidimensional array

It returns the resulting array. If the input arrays have the same string keys, then the values for these keys are merged together into an array, and this is done recursively, so that if one of the values is an array itself, the function will merge it with a corresponding entry in another array too. If, php recursive loop through multidimensional array, however, the arrays have the same numeric key, the later value will not overwrite the original value, but will be appended.

Recently I found myself in a situation where I needed to search and remove a value from a dynamically generated multidimensional array with a different size and length. After many trials and errors, I found that the best solution is to recursively loop through the array and locate and remove the value. First thing we're doing is checking if the array passed to the function is actually an array. If array passed is an array, we iterate through its elements. I wrote this piece of code during work, to search and remove elements from a dynamically generated multidimensional array. Recursion can be a life saver in many cases, hopefully my code will help you if you ever find yourself in the same situation as mine. Sign in Email.

Php recursive loop through multidimensional array

Applies the user-defined callback function to each element of the array. This function will recurse into deeper arrays. Typically, callback takes on two parameters. Note : If callback needs to be working with the actual values of the array, specify the first parameter of callback as a reference. Then, any changes made to those elements will be made in the original array itself. If the optional arg parameter is supplied, it will be passed as the third parameter to the callback. Returns true on success or false on failure. You may notice that the key ' sweet ' is never displayed. Any key that holds an array will not be passed to the function. Submit a Pull Request Report a Bug. Parameters array The input array.

If this might apply to you, please see for yourself. I'm completly lost after wasting like 10hours on this. Short description: If one of the Arguments isn't an Array, first Argument is returned.

I'm completly lost after wasting like 10hours on this. I don't know how to proceed, and my website not made by me initially process all smarty through php, so it never includes a smarty file directly in a template And can you show me an example? Going into recursing, the level is incremented, and having come out from recursing, the level is decremented. Also note that this is actually what was suggested earlier -- the template file. Now I can analyse your code!

Search through a multi-dimensional array for a specific key or value and replace the value in the original array using recursive functions. Finding and replacing values in a multi-dimensional array can be quite a challenge, especially when the structure, size and dimensions of the array are unpredictable. Finding the key or value you are looking for within a multi-dimensional array is not too difficult; you can create a recursive function to iterate over every dimension within your array and scan keys or non-array elements for the value you're looking for, but replacing the value in the original array is the real challenge. There are several ways you could go about solving this issue such as keeping track of the location of target values and replacing them afterwards, but this could be difficult and messy. A more suitable way is to make use of references in your function in order to directly modify values within your original array. In a nutshell, references are parameters that cause the variable given as an argument to change its value whenever the reference's value changes. The above code contains two functions, both of which have one parameter that is incremented.

Php recursive loop through multidimensional array

This iterator allows for unsetting and modifying values and keys while iterating over arrays and objects, in the same way as the ArrayIterator. Additionally, it is possible to iterate over the current iterator entry. RecursiveArrayIterator::getChildren ».

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Any key that holds an array will not be passed to the function. This will happen even if the callback function doesn't take its first argument by reference, and doesn't do anything to the values. I'm really a noob :'. We are processing it. Re: My vote of 5 Etienne Rached Mar Use array1 as the base array and then add in values from array2 as they exist. Oh, it ran your function recursively alright, but changed all the values in the local function scope only and returns a boolean as the documentation states. After many trials and errors, I found that the best solution is to recursively loop through the array and locate and remove the value. I hope this will help Submit a Pull Request Report a Bug. I wrote this piece of code during work, to search and remove elements from a dynamically generated multidimensional array. Just thought anyone may want to know about that. Note: This functionality is already provided by using the RecursiveIteratorIterator but is useful in understanding how to use the iterator when using for the first time as all the terminology does get rather confusing at first sight of SPL! It actually took me a while to figure out why my function wasn't changing the original array, even though I was passing by reference.

Applies the user-defined callback function to each element of the array.

This is not that. Oh, it ran your function recursively alright, but changed all the values in the local function scope only and returns a boolean as the documentation states. Now I can analyse your code! Just thought anyone may want to know about that. Is it normal that I have to do a recursive looping in PHP to create the array, then do the same recursive looping in Smarty to display it properly?? Instead of, they are all renumbered, starting with 0. This has the effect as to make this function unusable for most practical situations. We are processing it. This function didn't work for me - or it didn't do what I thought it would. This will happen even if the callback function doesn't take its first argument by reference, and doesn't do anything to the values. This is a simple example that lacks any DB calls and looping. I just tried to run that function on a three dimensional array, containing errormessages.