How to delete a file from the system?
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How do I escape data before storing it in the database?
How to check if a string contains a character or word in php?
How to concatenate two strings in php?
What is session data?
Is polymorphism inherited?
Questions on OOP concepts 1. What are the access specifiers available in php ? Explain 2. What is object cloning ? 3. What are the differences between interface and abstract class ? 4. What is overloading ? 5. What is overriding ? 6. How to prevent function overriding ? 7. What is the use of "final" keyword ? 8. What is static variable ? How will access a static variable ? What is static class ?
What is substr() in php? And how it is used?
How does php server work?
Who is the father or inventor of php?
What is the default session out time?
How to avoid the undefined index error?
Does php need apache?