PHP basic interview questions for 2 years experience candidate

1) What is the best practice for running MySQL queries in PHP ? Consider the risk of SQL injection.
2) Name the cryptographic function in PHP returns the longest hash value?
3) Explain implode/explode function ?
4) What will be the output ?

<?php var_dump(10*23); ?>         
       
 

5) What will be the output ?

<?php  echo 5 * 6 /3 + 6* 7; ?>
   
       
 

6) Write a function that will print the all values in the array.
 $array = array(array(12,13,19), 12, 33, array(101, 202, 303));

7) Write down the correct syntax of mail() function?

8) What will be the Output  ?

<?php print null == NULL; ?>
   
       
 

9) What will be the output?

<?php echo '1'.print(2) + 3; ?>
   
       
 

10) What is the difference between die() and exit() in PHP?
11) How can we use register_shutdown_function() in PHP ?
12) How can we use assert() and assert_options in PHP ?
13) Difference between die() and trigger_error() and set_exception_handler() ?
14) How can we delete a file in PHP ?