I have an array that is multidimensional and I need to test whether an offset exists. My reading of the PHP manual for array_key_exists makes sense for a single-dimension array.
My script takes results returned from the database and arranges them this way:
Array
(
[1] => Array
(
[0] => Array
(
[merged] => 0
[ingr_qty] => 1
[ingr] => pork tenderloin
)
[1] => Array
(
[merged] => 0
[ingr_qty] => ⅓ roll
[ingr] => sausage meat
)
)
[3] => Array
(
[0] => Array
(
[merged] => 0
[ingr_qty] => 2 tbsp
[ingr] => finely chopped onion
)
[1] => Array
(
[merged] => 0
[ingr_qty] => ⅓ cup
[ingr] => cranberry sauce
)
)
}It would be tedious to explain why the array is written in this fashion. So please accept that it needs to be this way to facilitate making a table later in the script.
Occasionally, the pairs are not balanced. Using the above example, data occasionally comes out like this:
Array
(
[1] => Array
(
[0] => Array
(
[merged] => 0
[ingr_qty] => 1
[ingr] => pork tenderloin
)
[1] => Array
(
[merged] => 0
[ingr_qty] => ⅓ roll
[ingr] => sausage meat
)
)
[3] => Array
(
[0] => Array
(
[merged] => 0
[ingr_qty] => 2 tbsp
[ingr] => finely chopped onion
)
)
}Without the existence of an Array[3][1] key, PHP throws an error of 'Undefined offset' when making the table.
The circumstance will always occur on the last element of the first-level array and element [1] of the second-level array.
To point to elements of the array in my script, it's defined as $row[$z][$y]. How can I check if $row[$z][1] exists?
