What is the difference between $var and $$var?

1064

---

Explain me what is the meaning of a persistent cookie?

1041

---

Tell me what is the importance of "action" attribute in a html form?

1113

---

What is use of in_array() function in php?

1101

---

How to strip whitespace (or other characters) from the beginning and end of a string?

890

---

Tell me how do you execute a php script from the command line?

999

---

Tell me what are the encryption techniques in php?

944

---

Tell me what does the initials of php stand for?

967

---

Tell me what are the correct and the most two common way to start and finish a php block of code?

973

---

What is the use of "echo" in php?

969

---

What is the use of 'print' in php?

1020

---

Do you know what is the use of the function 'imagetypes()'?

997

---

Tell me what the difference between the 'bitwise and' operator and the 'logical and' operator?

962

---

How to initiate a session in php?

1220

---

What does $globals means?

913

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