array_combine() is an another PHP pre built / default array function, This function is basically allows user creates an array by using the elements from one "keys" array and one "values" array. In the array_combine we must have both array in equal number of elements.
array_merge() is an another PHP pre built / default array function, This function is basically allows user to merge one or more arrays into one array. array_merge() merges the elements by appending them to the end of the previous element of array.
array_column() is an another PHP prebuilt / default array function, This function is basically allows user to get the values from a single column in the input array identified by the column_key.
array_chunk() is an another PHP prebuilt / default array function, This function is basically allows user split an array into smaller chunks of new array or we can say if we need to create smaller array of a big array then we can use the array_chunk();
array_change_key_case () is an another PHP prebuilt / default array function, This function is basically allows user to do the array keys lower or uppercase. It will rturn null and will Throw E_WARNING if array is not an array.
array_pop () is a prebuilt / default array function of PHP, This function is basically allows user to delete the last element of any existing array. By using this function user can short the array by one element
array_push () is a prebuilt / default array function of PHP, This function is basically allows user to add one or more elements at the end of any existing array. By using this function user can add any number of the element at the end, and this element can
PHP has very strong array features by using the array, it is very easy to use and access the data in PHP, By default PHP provides many array functions to access and manipulate the elements of array.