Extract images and links from website using php

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Web Crawling. The process by which we extract images, hyperlinks, metadata and several other things from a website is called web crawling. So in this tutorial you will learn about how to crawl images and hyperlinks from a website using php.And also I have used here jquery ajax for displaying the results without page refreshing, and its not mandatory.

Autocomplete with PHP, MySQL and Jquery

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Autocomplete Php is a cool technic you should learn to make your website or you web application looks cool and also user friendly. As you might have known, autocomplete gives a user a list of nearly same data with what he or she is looking for.

Save an image from URL using php

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Iam Explain about how to save an image form External URL,It is very simple using following code

<?php
  $imageurl ='http://sri-knowledgecorner.rhcloud.com/images/blogicon.jpeg';

  $image=file_get_contents($imageurl);
 
  $imagename = basename($imageurl);//image name
 
  define('DIRECTORY', 'images/'); //save image in images folder

  file_put_contents(DIRECTORY.$imagenam, $image);
?>

Make sure that you have write permission to the directory where you want to store the image.

Upload and display an image without a page refresh using Javascript and PHP

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Here Iam explain about how to upload an image without a page refresh using an iframe and some javascript.
Bunch of jquery plugins that do this, but you’ll see here that there is nothing really complicated about it and it can easily be achieved with a couple of javascript lines.

The trick to avoid this full page refresh is to use a ‘target’ attribute on the form and have it point to an iframe. As the submit button is clicked, the browser will load up the response in the targeted iframe without refreshing the whole page.

Top Five Most Used PHP Array Functions for Beginners

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There is more than fifty array functions available in PHP.
In this Article Iam explain 5 popular array functions

What is memcache and why you use memcache for your website

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Memcache is Free & open source, high-performance, distributed memory object caching system which improves the website performance In simple words every time your website opens it fetches data from database. Memcache cache this data locally on temporary cache so that every time your website page open it won’t run sql queries to fetch data from DB.

How to Install Memcache in Ubuntu

Difference Between Single And Double Quotes in PHP

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In PHP you can specify the strings by using single and double quotes. There are other methods (heredoc and nowdoc (since PHP 5.3.0)) are also used but first two are used mostly.
It is important to know the difference between using single quotes and double quotes. In this post we will see the difference between them and which should be used when

Single Quotes:
When string is specified in single quotes PHP will not evaluate it or interpret escape characters except single quote with backslash (‘) and backslash(\) which has to be escaped.

  <?php
   $name = 'srinu chilukuri';
   $member = 'This is $name';
   echo $member;
     ?>

If echo $member variable it will print the result as it is without interpreted.

output: This is $name

Double Quotes:
In double quoted strings other escape sequences are interpreted as well any variable will be replaced by their value.

  <?php
   $name = 'srinu chilukuri';
   $member = "This is $name";
   echo $member;
     ?>

output: This is srinu chilukuri