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Email Validation



Email Validation

<? 
function is_valid_email($email) { 
    if(ereg("([[:alnum:]\.\-]+)(\@[[:alnum:]\.\-]+\.+)", $email)) { 
        return 1; 
    } else { 
        return 0; 
    } 
} 
?>

Converts Hexadecimal to Decimal Number
C program to input hexadecimal number and convert it to Decimal number. Hexadecimal number system is a base 16 number system. It uses 16 symbols to represent all number i.e.

C++ Codes Heap's Algorithm Permutation
The time complexity of this algorithm: 'O(n!)'. This algorithm 'takes the input' of "N" distinct numbers. It fixes an element at the end of the array and permutes the "remaining numbers"

Programming Code to Concatenate String
To concatenate strings in 'C++' Programming, you have to ask to enter the 2 string and start concatenating one string into other using the strcat() function as shown here in the sample

C++ Codes Generate Armstrong Numbers
To generate 'Armstrong numbers' in C++, you have to ask to the user to enter the interval to print the Armstrong number between a given interval as shown here in the following codes.

Implementation for Deterministic Skip list
Finding the smallest item in the tree. Return smallest item or 'INFINITY' if empty. Find the largest item in the tree. "Return the Largest" item or INFINITY if empty. Find item x in the

Code Display the IP Address of the System
Create a socket to define network interface IPv4. Define the IPv4 address type. Define the port name where network is attached. Access the network interface information...

Cryptography by Transposition Technique
This "C++" Program implement transposition technique. In "Cryptography", a transposition cipher is a method of encryption by which the positions held by units of plaintext (which are

C++ Sample Calculate Power by Recursion
This technique can only calculate power if the exponent is a 'positive integer'. To find power of a number, you can use pow() function. C++ program calculates the power of any number