What are the difference between array_keys() and array_key_exists() in php?
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1. Create student database. 2. First page should display the students available in the database. There should be add, edit and delete buttons. 3. There should be option to search students by name, code, date of joining, department or combination of these. 4. Should have an add/edit screen. Add and Edit should be handled in the same page. 5. Delete should ask for confirmation before deleting the actual record. 6. Validation should be done in JavaScript as well as php.
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