As we all know that JavaScript is usually what involves in detecting different browsers and their varying capabilities. PHP has the very function that parses the HTTP request headers sent by client web browsers so as to determine the identify of the requesting browser as well as its capabilities. To get client browser information and …
One of the things the remote web server inspects is the client cookie to know about the requester. If you need cURL to simulate a user browser that sends cookie information to the web server, you need the following options: $c = curl_init(‘http://www.example.com/needs-cookies.php’); curl_setopt ($c, CURLOPT_COOKIE, ‘user=ellen; activity=swimming’); curl_setopt ($c, CURLOPT_RETURNTRANSFER, true); $page = curl_exec …
PHP cURL: Fetching URL and Sending Request with Cookies Read More »
By default, all HTTP requests made out by cURL is GET requests that simply fetches the URL and don’t submit any more POST variables. However, if you need to fetch and retrieve URL by the POST method with cURL, you need the snippet below: $url = ‘http://www.example.com/submit.php’; // The submitted form data, encoded as query-string-style …
To draw a line, use ImageLine( ): ImageLine($image, $x1, $y1, $x2, $y2, $color); To draw an open rectangle, use ImageRectangle( ): ImageRectangle($image, $x1, $y1, $x2, $y2, $color); To draw a solid rectangle, use ImageFilledRectangle( ): ImageFilledRectangle($image, $x1, $y1, $x2, $y2, $color); To draw an open polygon, use ImagePolygon( ): $points = array($x1, $y1, $x2, $y2, …
Debugging a PHP script, you may want to alter the error-displaying sensitivity on a particular page and control what types of errors should be reported. The solution is the PHP error reporting function error_reporting(): error_reporting(E_ALL); // everything error_reporting(E_ERROR | E_PARSE); // only major problems error_reporting(E_ALL & ~E_NOTICE); // everything but notices As the parameters of …
PHP: Change Error Reporting Level | Different PHP Error Types Read More »
A hash or digest can be thought of as the digital fingerprint of a piece of data. Hash is usually generated from any string of text in a fixed length by a one-way mathematical process. It is next to impossible to re-engineer the original text or data from the hash alone. Also, it is vast …
PHP: What is Hash? | Hashing a String | Generate Hash of Strings Read More »
Back tick ` in PHP is used to read the output from another program, usually external commands in Linux shell, much like the way a pipe does the job with bash. In PHP, Backtick “ embraced string is treated a command and executed externally in shell, returning the execution results from the standard output. For …
Of course, you will have to read in the file first, preferably in an array. To read a file in an array, you just need the file() function: $lines = file(‘quotes.txt’); Then, you shuffle the array with shuffle() function that randomizes all the items in the array thus shuffling the lines in the file quotes.txt: …
PHP: Randomizing All Lines of a File – Shuffle Lines in a Text File Read More »
As we know, lines are separated from each other by line breaks indicated by “\n” in PHP, therefore, one method would be to explode() the entire file content string by “\n” into an array and then count() the number of the array items to come to the number of lines of that file. However, there’s …
PHP: Count Lines of a File and Get the Number of Lines in a Text File Read More »
Aside from the common approach in reading a file with php fopen() function which is a little annoying in that it requires extra steps before actually reading the contents of the file. PHP has other file reading functions to enable you instantly get what you want and read the contents of the file without the …
PHP: Reading a File into a String or Reading the File into an Array Read More »
By remote file, I mean files from another website or web server identified by a remote URL. Usually, you can open such a file via the normal procedures you would take to open a local file with php file functions such as fopen() or file_get_contents(). However, to make this work, you will first make sure …
So you need a temporary file to hold some middle data. There are 2 functions in PHP you can use for creating temporary files: PHP function tmpfile() creates a temporary file, opens it and returns the file handler: $temp_fh = tmpfile(); f write($temp_fh, "The current time is ".strftime(‘%c’)); // the file automatically goes away when …
PHP can only copy, rename or move files that are of the same owner with who is running the PHP script. After making sure of this, you can proceed to: Copy a file to another place in PHP: $old = ‘/tmp/yesterday.txt’; $new = ‘/tmp/today.txt’; copy($old, $new) or die(“Unable to copy $old to $new.”); Rename a …
The function in PHP that’s used to create a directory is just the same with that in Linux bash shell: mkdir. First make sure the current working directory is where you want the new directory to be, then run this line of PHP: mkdir(‘new_dir’); // creates a new directory named new_dir under the current directory
Every PHP script process has its own current working directory, files and directory are created under this directory by default if not otherwise specified. The default working directory of any php script is the home directory of the php owner or the current working directory returned by Linux shell command pwd. As most of the …
As long as the owner of the php script has the necessary privilege to delete a file, the php script has the ability to delete it. To delete a file with PHP, use the unlink() function: unlink(‘tmpfile.txt’) or die(‘Unable to delete the file’); It returns true if the deletion is successful and false otherwise.
It’s common tasks to parse and deal with file paths or URL in PHP. And most common must be to identify and distinguish the directory path or file name from the file path or URL. For instance, the full path to a text file is: ‘/home/john/lanning.com/somefile.txt‘ and you want get the directory part as well …
PHP: Getting Directory Path and Filename from A Full Path or URL Read More »
There are 2 ways to the size of a file with PHP. PHP function filesize() returning the file size in bytes: $bytes = filesize(‘log.txt’); // $bytes now contains the size of the file log.txt in bytes PHP function stat() returning an array of information about the file including the size of it, also in bytes: …
Unless you have explicitly opted out with a noatime option mounting your Linux file system, there are generally 3 types of time on each and every file of Linux: atime or access time, ctime or change time, and mtime or modification time. These are the differences between the 3 file system times: atime — access …
File atime is the last accessed time of the file, in PHP, you can get the last accessed time of any file by: $last = fileatime(‘anyfile’); You may also want to know how to get the mtime or ctime of a file.
