A composer is a tool for dependency management in PHP. It allows you to declare the libraries your project depends on and it will manage (install/update) them for you.
System Requirements
Composer requires PHP 5.3.2+ to run. A few sensitive PHP settings and compile flags are also required, but when using the installer you will be warned about any incompatibilities.
To install packages from sources instead of simple zip archives, you will need git, svn, fossil or hg depending on how the package is version-controlled.
Composer is multi-platform and we strive to make it run equally well on Windows, Linux, and macOS.
Installation Instruction
1) Use PHP to download the composer installer, place it in the current directory, and name it composer-setup.php 2) Use PHP to check the hash of the file you downloaded and compare it to the known value of the hash. You can always find the current value of the hash for the installer on the Composer Public Keys / Signatures page. 3) Run the setup program to install the composer. This does more than just download the latest copy of the composer, it also sets up your local ~/.composer directory. This will install the composer into the current directory. You can add the –install-dir=DIR to specify where you want the composer installed. You can also specify –filename=composer to change the installed filename. You can use anything you like that doesn’t already exist in your specified directory, you don’t have to use the name composer. This is a great way to get rid of the .phar at the end of the name if you don’t like it. 4) Use PHP to remove the installer from the current directory.
To install composer for PHP you use PHP to download the installer, set a few options, and then actually perform the install.
In this post i will explain how to install Node.js on your hosting server.
Node.js is a JavaScript runtime and uses an event-driven, non-blocking I/O model that makes it lightweight and efficient. Node.js’ package ecosystem, npm, is the largest ecosystem of open source libraries in the world. You can check more information on their official website https://nodejs.org/en.
To install Node.Js open SSH and use third-party tool (Like Putty) to run commands or use Terminal provided on WHM or cPanel servers.
Now run below listed commands one by one to install Node.Js on your hosting server.
In this post you will learn how to get you tube video images and thumbnails.
There are various method to get Images or Thumbnails like using url manually or getting it from API. Below you will see both methods of getting this information.
Method 1.
Getting images manually using URL.
Each YouTube video has 4 generated images. They are predictably formatted as follows:
For the high quality version of the thumbnail use a url similar to this: https://img.youtube.com/vi/insert-youtube-video-id-here/hqdefault.jpg
There is also a medium quality version of the thumbnail, using a url similar to the HQ: https://img.youtube.com/vi/insert-youtube-video-id-here/mqdefault.jpg
For the standard definition version of the thumbnail, use a url similar to this: https://img.youtube.com/vi/insert-youtube-video-id-here/sddefault.jpg
For the maximum resolution version of the thumbnail use a url similar to this: https://img.youtube.com/vi/insert-youtube-video-id-here/maxresdefault.jpg
All of the above urls are available over http too.
Additionally, the slightly shorter hostname i3.ytimg.com works in place of img.youtube.com in the example urls above.
Method 2.
You can use YouTube Data API to retrieve video thumbnails, caption, description, rating, statistics and more. API version 3 requires a key*. Obtain the key and create a videos: list request:
NOTE: Not only that you need a key, you might be asked for billing information depending on the number of API requests you plan to make. However, few million requests per day are free.
Many times we need to create logs in our Web Applications to track any certain Errors or Response. We just need to put a bunch of code where you want to Create a log. In this post you will learn how to create logs using Php Code.
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<?php
$log="User: ".$_SERVER['REMOTE_ADDR'].' - '.date("F j, Y, g:i a").PHP_EOL.
This code will check for the filename. If its available then it will write into the file and if code does not find the file it will create the new for of given name and will write the Logs. You can also use this code in any function you want.
Lets you create HTML heading tags. The first parameter will contain the data, the second the size of the heading.
Examples:
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echoheading('Welcome!',3);
The above would produce:
Welcome!
Additionally, in order to add attributes to the heading tag such as HTML classes, ids or inline styles, a third parameter accepts either a string or an array:
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echoheading('Welcome!',3,'class="pink"');
echoheading('How are you?',4,array('id'=>'question','class'=>'green'));
There is an optional second parameter that is a TRUE/FALSE value that specifics if the src should have the page specified by $config[‘index_page’] added to the address it creates. Presumably, this would be if you were using a media controller:
Additionally, an associative array can be passed to the img() function for complete control over all attributes and values. If an alt attribute is not provided, CodeIgniter will generate an empty string.
Example:
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$image_properties=array(
'src'=>'images/picture.jpg',
'alt'=>'Me, demonstrating how to eat 4 slices of pizza at one time',
'class'=>'post_images',
'width'=>'200',
'height'=>'200',
'title'=>'That was quite a night',
'rel'=>'lightbox'
);
img($image_properties);
// <img src="http://site.com/index.php/images/picture.jpg" alt="Me, demonstrating how to eat 4 slices of pizza at one time" class="post_images" width="200" height="200" title="That was quite a night" rel="lightbox" />
$index_page (bool) – Whether to treat $src as a routed URI string
Returns:
HTML link tag
Return type:
string
Lets you create HTML tags. This is useful for stylesheet links, as well as other links. The parameters are href, with optional rel, type, title, media and index_page.
index_page is a boolean value that specifies if the href should have the page specified by $config[‘index_page’] added to the address it creates.
The Language Helper file contains functions that assist in working with language files.
Loading this Helper
This helper is loaded using the following code:
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$this->load->helper('language');
Available Functions
The following functions are available:
lang($line[, $for = ”[, $attributes = array()]])
Parameters:
$line (string) – Language line key
$for (string) – HTML “for” attribute (ID of the element we’re creating a label for)
$attributes (array) – Any additional HTML attributes
Returns:
The language line; in an HTML label tag, if the $for parameter is not empty
Return type:
string
This function returns a line of text from a loaded language file with simplified syntax that may be more desirable for view files than CI_Lang::line().
The Path Helper file contains functions that permits you to work with file paths on the server.
Loading this Helper
This helper is loaded using the following code:
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$this->load->helper('path');
Available Functions
The following functions are available:
set_realpath($path[, $check_existance = FALSE])
Parameters:
$path (string) – Path
$check_existance (bool) – Whether to check if the path actually exists
Returns:
An absolute path
Return type:
string
This function will return a server path without symbolic links or relative directory structures. An optional second argument will cause an error to be triggered if the path cannot be resolved.
Examples:
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$file='/etc/php5/apache2/php.ini';
echoset_realpath($file);// Prints '/etc/php5/apache2/php.ini'
$non_existent_file='/path/to/non-exist-file.txt';
echoset_realpath($non_existent_file,TRUE);// Shows an error, as the path cannot be resolved
echoset_realpath($non_existent_file,FALSE);// Prints '/path/to/non-exist-file.txt'
$directory='/etc/php5';
echoset_realpath($directory);// Prints '/etc/php5/'
$non_existent_directory='/path/to/nowhere';
echoset_realpath($non_existent_directory,TRUE);// Shows an error, as the path cannot be resolved
echoset_realpath($non_existent_directory,FALSE);// Prints '/path/to/nowhere'
