PHP usort explained
The usort function sorts an array by values where the values are sorted by a user-defined function. usort has the following syntax The comparison function takes two arguments and it…
is_dir not working
The is_dir() function in PHP allows users to check whether a file is a directory. It returns true if the file is a directory. However, the addresses provided must be…
PHP: Encrypting and Decrypting
The crypt() function provide one-way encryption. Using one-way encryption is like using a key to lock and unlock something. The key is your password. To encrypt: To decrypt:
PHP: File functions
Opening directory and listing files See the following code: output: To remove certain file name from the list, see the following code: This code lists all files except the ones…
Removing quotes – a step by step example of manipulating array data
This article shows some techniques of manipulating data in an array. To keep it simple, let’s start by looking how we can remove quotes from a variable. To remove a…
PHP: How to access last element in an array
Since PHP array are indexed from 0, the last element at any given time has the index count of array minus one. Following is a code example: The output of…
PHP: How to read command-line input
In PHP, all commandline parameter are passed to the $argv array. Following example shows how to use this array: $argv and $argv contain the passed parameters in the order they…
PHP fatal error – call to undefined function mb_string
This error tells us that the mb_string library is not installed. mb_String is a library, which provides support for UTF-8 and UCS-2 characters. PHP uses ASCII by default which is…
Java: removing enclosing quotes
The following code would remove enclosing quotes from Java Strings With this regular expression, if Java sees an opening double quote (^\”) or | a closing double quote (\”$) then…
Java Stack
Stack is a LIFO ADT (Last in first out abstract data type) and a linear data structure. In a jar the items on top (i.e. items that went in last)…