A Guide to Mobile and Web Technology(LAMP)

Archive for the ‘Php’ Category

List all the files in a directory in php

This code will display all the files in the images folder.

foreach (glob("images/*.*") as $filename) {
       echo basename($filename);
}

Google Search text code using php

The following lines of code will provide search results using the google search API.

//search text to be passes
	$search_text = "katharnavas";
	$url = "http://ajax.googleapis.com/ajax/services/search/web?v=1.0&q=".$search_text;

	$ch = curl_init();
	curl_setopt($ch, CURLOPT_URL, $url);
	curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
	$results = curl_exec($ch);
	curl_close($ch);

	// The results will be in json encoded format so do a decode
	$json = json_decode($results);
	print_r($json);

How to update twitter status using php

The following lines of code are used to update your status in twitter.

//Text to be updated on twitter
$status = "Hi this is the text to be updated";
//your twitter username
$username = "xxxxusername";
//your twitter password
$password = "password";
$postvars = "status=".$status;
$url = "http://twitter.com/statuses/update.xml";</code>

$ch = curl_init($url);
curl_setopt($ch, CURLOPT_HTTPAUTH, CURLAUTH_BASIC);
curl_setopt($ch, CURLOPT_USERPWD, "$username:$password");
curl_setopt($ch, CURLOPT_POST, 1);
curl_setopt($ch, CURLOPT_POSTFIELDS, $postvars);
curl_setopt($ch, CURLOPT_FOLLOWLOCATION, 1);
curl_setopt($ch, CURLOPT_HEADER, 0);  // DO NOT RETURN HTTP HEADERS
curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);  // RETURN THE CONTENTS OF THE CALL
$res=curl_exec($ch);
curl_close($ch);

Read webpage or external file contents in php

The following are the different ways of reading a web page or external file contents in php.

$pageurl = "http://google.com";

//First Method

$r = new HTTPRequest($pageurl);
$html = $r->DownloadToString();
echo $html;

//Second Method

$html =file_get_contents($pageurl);
echo $html;

//Third Method (Using Curl) For this curl support should be enabled.

echo phpinfo();

//to check whether curl is enabled or not.

$ch = curl_init($url);
curl_setopt($ch, CURLOPT_HTTPAUTH, CURLAUTH_BASIC);
curl_setopt($ch, CURLOPT_FOLLOWLOCATION, 1);
// DO NOT RETURN HTTP HEADERS
curl_setopt($ch, CURLOPT_HEADER, 0);  
 // RETURN THE CONTENTS OF THE CALL
curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1); 
$res=curl_exec($ch);
curl_close($ch);
print_r($res[2]);

Email Validation using Php and Javascript

This function checks whether the email provided is valid and returns false if not valid.

Php Function for validating email

//$email -> email value to be validated.

function callEmailCheck($email, $strict = false)
{
$regex = $strict? '/^([.0-9a-z_-]+)@(([0-9a-z-]+\.)+[0-9a-z]{2,4})$/i' : '/^([*+!.&amp;#$¦\'\\%\/0-9a-z^_`{}=?~:-]+)@(([0-9a-z-]+\.)+[0-9a-z]{2,4})$/i' ;
if (preg_match($regex, trim($email), $matches))    {
return array($matches[1], $matches[2]);
}
else {
return false;
}
}

This function checks whether the user email entered in the text box is valid or not. Call this function on submit.

Javascript Function for validating email

function callEmailCheck() {
var emailreg = /^([A-Za-z0-9_\-\.])+\@([A-Za-z0-9_\-\.])+\.([A-Za-z]{2,4})$/;
//useremail is the name of the email text field.
var email = document.getElementById("useremail").value;
if(emailreg.test(email) == true){
return email;
}
return "";
}
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