PHP Tutorials Code Snippets and Php Tips » Short PHP Functions

PHP Tutorial : Upper Case Characters

admin — Mon, 16 Mar 2009 21:09:53 +0000

Another week, another fresh post over here. I will write shortly about two ways on how to make characters/letters upper case (capitalize). One way its strtoupper (string to upper) which converts all string, and the second its for first character only function ucfirst(). Here comes the example:

<?php
$capitalizeString = strtoupper("my string");
//will return MY STRING

$capitalizeFirst = ucfirst("my");
//returns My

?>

PHP Tutorial : Exit and Die Functions

admin — Sun, 08 Mar 2009 20:54:28 +0000

hi,
I have two mins to write about those two very basic functions which will make your script to stop completely, the code will not be interpreted anymore before the line where says exit or die. have some tests (first one will exit without any notice and with the second one you can show a message to the browser before stoping the script)

<?php

print "something";
exit();

print "will not print";
//or like this which will show a message too
print "something else";
die("message");
?>

PHP Tutorial : Get file extension

admin — Mon, 19 Jan 2009 20:08:51 +0000

With the next three lines of php code you will be able to get a file extension.

<?php
$file = "somefile.gif";
$ext = end(explode('.', $file));

print "Your file extension is $ext";
?>

PHP Tutorial : Valid email checking script

admin — Mon, 05 Jan 2009 17:34:50 +0000

Hi,
Do you have any newsletters, contact forms or other pages where you require an email address ? If so, did you ever thought that someone might type “asd”, “452″ and other dummy words instead of a valid email address? Huh, for that I built an email validation script which checks for those things.

<?php
function validMail ($email,$link) {
	if(!eregi("^[a-z0-9_]+@[a-z0-9\-]+\.[a-z\-\.]+$",$email)) {
		print "Email address appears to be invalid<br />";
		print "Go back <a href=\"$link\" title=\"inapoi\">click aici</a>";
		exit();
	}
}
?>

You will need to pass two arguments :
1) $email field
2) $link to go back if email is invalid
Right like here

<?php
$email = "abcdef";

validMail($email, "complete-form.php");
?>

PHP Tutorial : Function To Refresh a Page

admin — Mon, 08 Dec 2008 12:43:03 +0000

Well,

This php function uses the html meta tag and its refresh attribute. I use it because I can easily estabilish how many seconds to wait before refreshing the page : nice, isn’t it?

There is already a php function which refreshes a page, but there isn’t a way to pass the number of seconds needed before refreshes, it’s just refreshes the page when the php engine goes to the line of code.

Here is the function :

<?php
//function to refresh a page in a number of seconds

function refreshPage($destination, $seconds)
{

print "<meta http-equiv=\"refresh\" content=\"$seconds; url=$destination\">";
}
?>

PHP Tutorial : Function – Filter unwanted words

admin — Mon, 08 Dec 2008 12:06:12 +0000

Hello,

I finded it usefull to build a simple and maximum 10 lines of code php function which can be used in filtering words that you wouldn’t want to appear on your website, forum, guestbook, comments, etc.

The most common way where is to use it within a html form, validating an input, textarea element, etc.

The code is built and commented below :

<?php
//call the special word which builds a new function

//custom php function and give it a nice name
function filterMe($whatToFilter, $listOfUnwantedWords)
{

foreach ($listOfUnwantedWords as $value) {

if (preg_match("/$value/i", "$whatToFilter")) {

print "You have used an unallowed word";
exit();
}
}
}
?>

Usage of this php function to filter unwanted words : firstly, build an php array with unwanted words, then apply the function where you need it. Example :

<?php
//create array with not wanted words

$Unwanted = array("www", "mywebsite", "etc");
//estabilish which given word to filter

$word = $_POST['yourinput'];
//function in action


filterMe($word, $Unwanted);
?>

Feel free to use it anywhere!