PHP is a relatively easy language to learn if you are familiar with HTML/CSS. Here, and following, are the presentations to familiarize yourself with PHP/MySQL and HTML Basics.
2. What has been covered?
PHP Conditional Statement
If Statement
If-else Statement
If-elseIf-else Statement
Switch Statement
Loop Statements
For Loop
While Loop
Do While Loop
Practice Questions
3. What is an Array ?
An array stores multiple values in one single
variable.
The values of arrays can be accessed by using
their position in the array.
Example
<?php
$tech = array(“Java", “Net", “PHP");
echo "I like “. $tech[0].", “. $tech[1]." and
“.$tech[2].".";
?>
4. What can an array do ?
Array acts like a special variable
It can hold more than one value at a time
The location of the array is also called an index
number
The first value in the array holds the index
number 0
The array( ); function is used to declare an array
5. Types of arrays
There are three types of arrays
Indexed Array
Associative Array
Multi-Dimensional Array
6. Indexed Arrays
In indexed arrays, a particular index is assigned
to the value automatically
Declaration
$tech= array(“Java", “NET", “PHP");
$ tech] = " Java ";
$ tech] = " NET ";
$ tech] = " PHP ";
7. Associative Arrays
Rather than using index keys, we use name keys
to associate a particular value.
Declaration :
$age = array(“Virat"=>“28", “Dhoni"=>“36",
“Sachin"=>“41");
$age[Virat'] = “28";
$age[‘Dhoni'] = “36";
$age[‘Sachin'] = “41";
<?php
$age = array(“Virat"=>“28",
“Dhoni"=>“36", “Sachin"=>“41");
foreach($age as $x => $x_value) {
echo "Key=" . $x . ", Value=" .
$x_value;
echo "<br>";
}
?>
8. PHP Sort Function for Arrays
sort() - sort arrays in ascending order
rsort() - sort arrays in descending order
asort() - sort associative arrays in ascending
order, according to the value
ksort() - sort associative arrays in ascending
order, according to the key
arsort() - sort associative arrays in descending
order, according to the value
krsort() - sort associative arrays in descending
order, according to the key
