PHP Interview Questions and Answers
Question: So if md5() generates the most secure hash, why would you ever use the less secure crc32() and sha1()?Answer: Crypto usage in PHP is simple, but that doesn't mean it's free. First off, depending on the data that you're encrypting, you might have reasons to store a 32-bit value in the database instead of the 160-bit value to save on space. Second, the more secure the crypto is, the longer is the computation time to deliver the hash value. A high volume site might be significantly slowed down, if frequent md5() generation is required. |
Save For Revision
Bookmark this item, mark it difficult, or place it in a revision set.
Log in to save bookmarks, difficult questions, and revision sets.
Is it helpful? Yes No
Most helpful rated by users:
- What does a special set of tags <?= and ?> do in PHP?
- What's the difference between include and require? -
- I am trying to assign a variable the value of 0123, but it keeps coming up with a different number, what's the problem?
- How do you define a constant?
- Would I use print "$a dollars" or "{$a} dollars" to print out the amount of dollars in this example?