How long does a session last in php?

965

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Why does sql injection happen?

1006

---

What is url encoding and decoding in php?

1111

---

What is the use of magic function in php?

972

---

What is the use of print_r function in php?

942

---

What is the use of offset in mysql?

943

---

What is the maximum size of a database in mysql?

1002

---

What is the difference between require_once and require in php?

1099

---

What is the maximum size of a table in mysql?

1010

---

What is urlencode and urldecode in php?

1135

---

What is the difference between null and empty?

1028

---

What is the use of inner join in mysql?

987

---

Why triggers are used in mysql?

962

---

Why print_r is used in php?

955

---

What is a stored procedure in mysql?

1089

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