How long does a session last in php?

958

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Why does sql injection happen?

996

---

What is url encoding and decoding in php?

1096

---

What is the use of magic function in php?

965

---

What is the use of print_r function in php?

935

---

What is the use of offset in mysql?

937

---

What is the maximum size of a database in mysql?

998

---

What is the difference between require_once and require in php?

1086

---

What is the maximum size of a table in mysql?

1004

---

What is urlencode and urldecode in php?

1121

---

What is the difference between null and empty?

1015

---

What is the use of inner join in mysql?

978

---

Why triggers are used in mysql?

956

---

Why print_r is used in php?

952

---

What is a stored procedure in mysql?

1087

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