PHP Note begin
First thing need to know that is the phpinfo() function, after you setup the server, how could you test the server can process php script or not? You can create a file like this
< ?php
phpinfo();
?>
then open the file using your browser, then the page will display all your server environment information.
or you can just simply echo a string to display 😛
< ?php
echo ("Hello World");
?>
That can do it too 😀
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Loops
When learning a programming language, some basic loop need to know
They all look pretty much the same {nearly} (C#, VB, .NET, Java, PHP) < - I've learned
1. Do – Wile Loop
Syntax
$i = 0;
$n2 = 0;
do{
echo "The number is " .$n2."
";
$n2++;
$i++;
}while($i < 10);
2. While Loop
Syntax
$i = 0;
$n2 = 0;
while ($i < 10){
echo "The number is " .$n2."
";
$n2++;
$i++;
}
3. For loop
Syntax
$n2 = 1;
for($i = 0; $i < 10; $i++){
echo "The number is ".$n2."
";
$n2++;
}
3.1 For Each loop for array in PHP
Syntax
$x = array(1,3,5,7,9);
foreach ($x as $val){
echo $val."
";
}
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Statements
And then most important {if else} statement
1. If Else Statement
Syntax
$i = 8;
if ($i == 0){
$i = 0;
}
else{
$i = 8;
}
2. Switch Statement
Syntax
switch ($x){
case 1:
echo "Number 1";
break;
case 2:
echo "Number 2";
break;
case 3:
echo "Number 3";
break;
default:
echo "Other Number";
}
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Functions
Syntax
< ?php
function doSomething(){
echo "Inside do something function";
}
echo "I am in ";
doSomething();
?>
Function with parameters
< ?php
function writeName($fname){
echo $fname . " Refsnes.
";
}
echo "My name is ";
writeName("Kai Jim");
echo "My sister's name is ";
writeName("Hege");
echo "My brother's name is ";
writeName("Stale");
?>
Function with Return values
< ?php
function add($x,$y){
$total=$x+$y;
return $total;
}
echo "1 + 16 = " . add(1,16);
?>
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Continue with
Array Page