PHP exercises

i like to earn to do web site developed, and to do Photo shop design how can i get work?

 

http://www.w3schools.com/php/

 

I am going to develop a site for PHP, HTML, CSS, Jscript I hope it will help me and others in learning PHP etc, All of you can also contribute. it is keyphp

 

Unofficial answers, answered because I'm bored. Answers are in the smallest, most efficient way I could figure out.
1)

echo 'I am '.$name='Mario';
//Bossing right through #1

PHP:

2)

$name=strtolower('Mario');
echo ($name=='mario')?'I am $name';
//Ternary operators are cool looking AND efficient!

PHP:

3)

$name=strtolower('Mario');
echo ($name=='mario')?'I am $name':'No, no, no.  That is not my name!';
//Expanding the ternary operator usage with the ternary 'else' statement

PHP:

4)

$i=0;
while($i<5){echo $i;$i++;}

PHP:

5)

for($i=0;$i<5;$i++){echo $i;}

PHP:

Quiz:

1. C and B. B is used for single-line comments, while C is used for block comments, spanning multiple lines.
2. B and D. echo is better, as far as speed goes, but both are language constructs that don't really have much of a huge difference.

Questions:
1. <?php is preferred. <? is very often a very bad practice to use, since XML tags also open with <?. If you haven't aptly named your file with .php, or you have some weird server setup, your PHP could be parsed incorrectly; as XML, in fact.

2. Well, there are two things wrong with this code, I'd say. One is personal preference, the other is the error.
--The preference error is that you've used ++$i. Althogh this works, you're pre-incrementing the variable, which doesn't serve much different than $i++ (the standard) in for loops. Again, just personal preference.
--The actual error is you've forgotten to put a semicolon after the echo $i in the third line.

3. That is absolutely horrible code, in every way. Of course, it's meant to be. The many issues are as follows:
--No input is sanitized. As a rule of thumb, treat ALL of your users like high-profile hackers. If it can be hacked, it WILL be hacked.
--You're actually using a GET form for a login. Bad, bad, bad. Even if you do a lightning-fast redirect after the login, that visited URL is saved in your history.
--You're using easy to sniff variable names like $username and $password. Network-sniffing hackers will be looking for these, so it's your best bet to change it to something at least a little different.
--As for fixing these errors, run a mysql_real_escape_string on both inputs, change your form fields' names, use HTTPS (this IS a government login), and use POST instead of GET.

End of test!

$target=setTarget($_ENV['legs'],'town');
walkTo($target);
jump($_GET['bench']);
$techno=analyze($_ENV['current']['song']);
if($techno['type']==='hard'&&$techno['style']==='repetitive'){echo 'I\'M A PROGRAMMER';}

PHP:

 

On the contrary, I believe there IS a right way.

The right way is the way that gives you the same result in the least amount of code. I could write this:

$variable='this variable';
if (strtolower($variable) == 'not this value') {
echo 'Incorrect!';
}
else if (strtolower($variable) == 'not this one either') {
echo 'Incorrect!';
}
else if (strtolower($variable) == 'still not getting the picture?') {
echo 'Incorrect!';
}
else if ($variable == $variable) {
echo 'Correct!';
}
else {
echo 'Incorrect!';
}

PHP:

Which is obscenely stupid, but it could be written as:

$variable='this variable';
switch(strtolower($variable)){
case 'not this one either':
case 'still not getting the picture?':
default:
echo 'Incorrect!';
break;
case $variable:
echo 'Correct!';
}

PHP: