Does PHP have a limit to how many are in an array....

I mean, lets say we have array $array[].

Can we reach a spot in that array when PHP would say that is too many?

Say $array[1234] or $array[1234567]?

Also, is there a limit to the quantity of times that a loop will work to?


I have a PHP program to send out email messages as part of email marketing. But for some reason it will not load up the require() file containing the email addresses when there are a lot of addresses in the file.

The only limitation (I'm aware of) on array size is the maximum memory allocation.

Similarly the only limitation on the number of loop iterations is the maximum execution time.

I have a PHP program to send out email messages as part of email marketing. But for some reason it will not load up the require() file containing the email addresses when there are a lot of addresses in the file.

Require should be used when loading source files, not data. My guess is that the size of the file exceeds your maximum memory and require is trying to load the whole thing into memory.

Try using fread to load a fixed number of bytes in a loop. Depending on how your data is formatted you might have some issues with partial entries at the end of each segment. You can resolve this by saving the partial entries until you load the next segment.

I know it's not an answer but I suggest you to add all those mails into a mysql (or another) database and read them with a LIMIT. It's the same thing as NullPointer says about fread but in this case you have a lot more control (having some flag with send emails and so on).