PHP Programming

php - echo

2009-12-10T12:59:00.001-08:00

For output a text, variables, html tags and etc. is used function PHP echo

PHP echo function will output the text inside it.

Example 1: output variable

<?php
$country = "Canada";
echo $country;
?>

Result:

Canada

Example 2: output text

<?php
echo "Country";
?>

Result:

Country

Example 3: output text with variable

<?php
$my_name = "Valeri";
$my_country = "Georgia";
echo "My name is" . $my_name . " and I am from " . $my_country;
?>

Result:

My name is Valeri and I am from Georgia

Example 4: output text with variables and with html tags

<?php
$my_name = "Valeri";
$my_country = "Georgia";

echo "My name is " . $my_name . "    and I am from " . $my_country . "";
?>

Result:

My name is Valeri
and
I am from Georgia

php - variable

2009-12-06T07:49:00.000-08:00

For storing different types of values, we can use variables

variables in PHP start with this $ dollar symbol.
Name of a variable in php must start with a letter or with this _ symbol.
Name of a variable in php must contain only alpha-numeric characters and underscores(abc...z, ABC...Z, 012...9, _)
Name of a variable in php should not contain spaces, it will be mistake. if your variable contains more then one word, you can use separator($my_name)
A variable does not need to declare value type, Php will automatically converts this variable to the correct data type.

declare text string type variable:
$variable_name = "Myname";

declare text string type variable:
$variable_name = 5;

after decleration a variable, you can use each time you want in your script variables in php

The result is :

Canada

echo print the value of the $country variable.

php - comment

2009-12-06T05:35:00.001-08:00

you have two way to comment in php

php - My first program

2009-12-06T04:29:00.000-08:00