Explain how does one prevent the following warning ‘warning: cannot modify header information – headers already sent' and why does it occur in the first place?

990

---

Tell me what is htaccess?

920

---

Tell me what are magic methods?

976

---

Do you know what are traits?

1006

---

Explain how can we execute a php script using command line?

1023

---

Explain the value of the variable input is a string 1,2,3,4,5,6,7. How would you get the sum of the integers contained inside input?

975

---

Explain what is memcache?

993

---

Explain what are psrs? Choose 1 and briefly describe it?

970

---

Explain how we can get the number of elements in an array?

1040

---

Tell me what library is used for pdf in php?

1009

---

Do you know how to get the ip address of the client?

1154

---

What are the benefits of composer?

1009

---

Explain why would we use === instead of ==?

934

---

Explain me what are the main error types in php and how do they differ?

993

---

Why and where do we use htaccess?

1036

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