What is isset and unset in php?
How can we increase execution time of a php script?
How to check your php installation?
Differentiate between php5 and php7?
How to convert a string to lowercase in php?
What is the use of "echo" in php?
How stop the execution of a php scrip?
Tips to optimize the php script..... Suggestion for exception handling in php...
Why is php so popular?
So if md5() generates the most secure hash, why would you ever use the less secure crc32() and sha1()?
How to join multiple strings into a single string?
What does $_env mean?
This is regarding file uploading. 1. Who will be the owner of the uploaded file ? 2. What permission you will give for an uploaded file ? 3. What is mean by user, group and others and what kind of permission you will give for each user and explain the reason?