A numeric array can be indexed numerically using numbers or numeric variables. An associative array uses alphanumeric identifiers to index elements.
The main benefit of the array
keyword is that it enables you to assign several values at a time to
an array without repeating the array name.
Both the each function and
the foreach...as loop construct
return elements from an array; both start at the beginning and
increment a pointer to make sure the next element is returned each
time, and both return FALSE when
the end of the array is reached. The difference is that the each function returns just a single element,
so it is usually wrapped in a loop. The foreach...as construct is already a loop,
executing repeatedly until the array is exhausted or you explicitly
break out of the loop.
To create a multidimensional array, you need to assign additional arrays to elements of the main array.
You can use the count
function to count the number of elements in an array.
The purpose of the explode
function is to extract sections from a string that are separated by an
identifier, such as extracting words separated by spaces within a
sentence.
To reset PHP’s internal pointer into an array back to the first
element, call the reset
function.