Ehsanul Haque

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Tags: address, Book, cannot, CAPTCHA, class, coma, export, Grab, Grab Yahoo, GrabYahoo, Group, LinkedIn, LinkMeIn, name, PHP, time, validation, world, Yahoo

13 March

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“sed”: Find and Replace Command on Linux Command Line

Posted by Ehsan in Codes, Interest, Linux, Mac, Playground

Sometimes we use IDE to find and replace strings in our file(s). IDEs have features to search for a keyword in all the files in a directory and replace with a given string. When you’re on Linux and using command line you can easily do this using the command “sed”.

According to the linux manual (man sed) “sed” is a stream editor which is used to perform basic text transformations on an input stream. With this command you can efficiently find and replace text in one or multiple files or you can keep the original file and make a new file with the replacement text.

To find and replace text in the original file the command is:

sed -i 's/find/replace/g' original.php

In the command above, “-i” option instructs to edit file(s) in place. “s” command attempts to match the pattern space against the supplied “find” string (which is a regular expression pattern). If the match is successful, then that portion of the pattern space which was matched is replaced with “replace” text. “g” is used to specify a global change, i.e. the string will be changed everywhere in the file(s) where it finds them. As mentioned earlier the “find” string is basically a regular expression pattern, and the replacement may contain special character (&) or escapes (\1 through \9) to refer to the corresponding matching sub-expressions in the “find” regular expression.

To find text in a file and output to a different file with the replacement the command is:

sed 's/find/replace/g' original.php > replaced.php

In the last command if you do not specify the output filename, it will simply show the file content on the screen with replaced string. There’s another command (similar to “sed”) which can be used for the same purpose is from perl.

perl -pi -e 's/find/replace/g' original.php

This command will find the word “find” and replace with the word “replace” in original.php. For this command “-p” option assume a loop like “while (<>) { …. }” (which is similar to the option -n but it prints the lines as well). The following option “i” performs the same task as it does for “sed”. Then “-e” says anything after it is a online of program. According to the manual several “-e program” can be used.

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Tags: Command, expression, file, line, Linux, linux command, option, original, output, pattern, perl, perl -pi -e 's///g' *, PHP, replacement, sed, sed -i 's///g' *, space, stream, string, text

05 October

3Comments

PHP Function I frquently use

Posted by Ehsan in Codes

While developing the web applications with PHP I have made my own small function library. In this library I have few functions that I use very frequently. One of the functions that is used more often is echo_d(). The purpose of this function is to check a variable to see if it is empty or not set; then based on the check result it either prints a default value or the value of the variable.

This is a simple function that saves me a lot of time and keeps my main codes cleaner. So here it is.

function echo_d($var, $def) {
  $var = trim($var);
  echo ((isset($var)) && (!empty($var))) ? $var : $def;
}

When to use this function? One of the most common places I use this function is in the reports. When I am generating reports for anything I always have to check whether certain value is in the database; it prints a default value if it cannot find one. The usage of this function in the scenario is something like:

$lastLoginDate = $rowsFromDB['last_login_date'];
echo_d($lastLoginDate, "---");

This function can be expanded to make it more versatile but I have found this tiny little function very useful.

–
Thank you.

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Tags: check, def, default, Function, lastLoginDate, library, lot, PHP, purpose, result, value, var, variable, web

07 July

2Comments

FeedPHP – One Stop Feed Mall

Posted by Ehsan in Resources

FeedPHP.com is a nice initiative taken by Mr Hasin Hayder. This One Stop Feed Mall (that I would like to call it) gives the visitors all the Feeds from PHP and related news source, blogs, groups.

I use Feed Reader software to keep in touch with various Feeds related to PHP, MySQL, AJAX, PostgreSQL, Ruby etc. But with FeedPHP service this makes my life easier. I can access it from anywhere (well known beauty of web) and stay updated with the latest group posts or new codes added to weberdev.com.

Great service I should say. Thanks Hasin for your nice step to provide us with the FeedPHP.

~~NiCe IdEa~~

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Please visit the download page here to download the class pack.

Tags: FeedPHP, MySQL, PHP

25 May

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Grab Yahoo Class on phpclasses.org

Posted by Ehsan in Interest, Playground, Resources

Today my class titled Grab Yahoo has been published on www.phpclasses.org.

This class is a collation of my previous two scripts in PHP to grab Yahoo address book and messenger list. You will have to provide your
Yahoo account username and password to it which will return an array of the list of your choosen service (Address Book or Messenger List).

This will be useful in a way that anyone willing to provide the service like upon user registration to the site, you ask the person to invite people on their Yahoo address book etc. Similar to what Hi5, Name Database etc does.

Visit the discussion board to post any suggestion, comment or bug to report.

Please don’t forget to rate my script.

Visit this page to see the demo.
~~Thanks to all and God Bless!!~~

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Tags: class, Grab, Grab Yahoo, messenger, PHP, phpclasses.org, Yahoo

18 May

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Yahoo! Services with PHP cURL

Posted by Ehsan in Interest, Playground, Resources

Using cURL in PHP is not that tough after all. Just the other day I came up with a script that grabs the Yahoo! Address Book. Today I have modified the same script to grab Yahoo! Messenger friend list.

Check out grabbers here.

One must know the URLs that Yahoo! goes through and data that it passes for authentication. After cURL helps you to authenticate on Yahoo, you simply write a Cookie file to contain the session information. This file is used later part of the script where cURL helps you to grab the address book or messenger list.

You will need to trick Yahoo by sending header information like HTTP Referrer. Address book is grabbed in CSV format, which needs to be parsed to show your desired information. There are 82 columns that address book sends you!! For messenger it is just cleaning up a HTML file generated by cURL. You instruct cURL not to give any output of the generated result, then save it on a temporary file, clean up unnecessary information, reformat the remaining information and print it on the screen. At the end you MUST use unlink() to delete all the files that were generated during the process. Cookie file, messenger list file etc. I have deleted them, being a good boy!!

Here is the partial sample code.

https://login.yahoo.com/config/login?”;

$ch = curl_init();

curl_setopt($ch, CURLOPT_USERAGENT, $useragent);

curl_setopt($ch, CURLOPT_URL, $url);

curl_setopt($ch, CURLOPT_POST, 22);

curl_setopt($ch, CURLOPT_POSTFIELDS, …..!!! STOP HERE

The script for grabbing Yahoo messenger list has been published on weberdev.com. Please click “Yahoo! Messenger Friend List” to see my code on weberdev.com and download the ZIP attached to the example.

~~EnJoY~~

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