You can change array key too easily but doing it without changing the order in PHP is quite tricky. Simply assigning the value to a new key and deleting old one doesn’t change the position of the new key at the place of old in the array.
Want to convert a Bootstrap 4 nav menu dropdown to a multi column container or mega menu? Or need a navbar that breaks navigation links into responsive Bootstrap 4 columns, even in WordPress. Check the attached image to know what I have meant.
In PHP we either create objects and their array, or database returns array of objects as result-set of some query. There we might need to find an object which have a particular property-value pair. There is no direct function available in PHP to perform the same so I’m explaining here how can we find object by value in array of objects by using a foreach loop.
Many times we face the problem of getting all the form controls or elements values of a long form. Because sometime getting so many controls by their id or name is very typical that make a long list.
So we need to opt a short way for getting all element values using jQuery. I have described three ways in this article.
While working with array in PHP sometimes we need to check if a value exists in an array and delete that key and value together from array. This simple code snippet below with explanation will help you to understand how can you delete element by value from array (not by key).
Sometime we face a unique type of problem during development and we watch the code thoroughly but not find the error where we are getting. ‘Only variables should be passed by reference‘ in $file_extension = end(explode(‘.’, $file_name)) is the same type of problem which does not seem as error in our code and it happens in usual code.
1. Use splice() method
2. Set length to zero
3. Using pop() method
4. Set array to new empty array
Syntax is as below:
Syntax is as below:
array.slice( begin [,end] );