Question:Define exceptions?

 

Programming, like the real world, often involves unforeseen happenings that disrupt the flow of events. In programmer’s lingo, these unexpected happenings are known as exceptions.

Question:How many ways you can read a file?
     

We can read a file by using the following file modes :
           R, r+, w+, a+.

Question:What are the types of key of array? 

There are two types of key of array. It can be numerical And associative.
Numerical :It stores each array element with numeric index name.
associative : It contains characteristic element or string index name.

Question:What is regular expression?

 

Regular expressions provide the foundation for describing or matching data according to defined syntax rules. A regular expression is nothing more than a pattern of characters itself, matched against a certain parcel of text.

Question:How many ways you can read a file?

 

We can read a file using the following methods and  modes:

Methods: file(), file_get_contents(), fgetcsv(), fgets(), fgetss(), fgetc(), fread(), readfile(), fscanf().

Modes: R, r+, w+, a+, x+.

Question:
What are class and object?
 

Class:Classes are intended to represent those real-life items that coder like to manipulate within an application.
object: An instance of class is called object.

Question:What is the meaning of a final class and a final method? 

Final keywords indicates that the class or method cannot be extended.

Question:How many ways you can write into a file?

 

We can write a file using the following method and modes:

Method: fwrite() with fopen() and write mode, file_put_contents(),fputcsv(),fputs(),fputc().

Modes: r+, W, w+,A,a+,X,x+.

Question:What is property overloading? 

Property overloading continues to protect properties by forcing access and manipulation through public methods, yet allowing the data to be accessed as if it were a public property.

Question:What is the functionality of the function strstr and stristr?

 

Strstr(): The strstr() function returns the remainder of a string beginning with the first occurrence of a predefined string.

Stristr():The strstr() function returns the remainder of a string beginning with the first occurrence of a predefined string ignoring case-sensitivity.