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PHP if -- else statement in conditions

If statement enable programmer to execute a script only when a condition is true.
And Else enable to quickly execute a script when the condition fails.

PHP Code:

<?php
$myname = "Smith" ;
if ( $myname == "Smith" ) {
echo "hello ! Your are Smith"; // wil be displayed only if condition is true
} else {
echo "hello ! Your are not Smith";// wil be displayed only if condition is false
}
?>

This may also be writed like this:

<?php
$myname = "Smith" ;
if ( $myname == "Smith" )
echo "hello ! Your are Smith"; // wil be displayed only if condition is true
else
echo "hello ! Your are not Smith";// wil be displayed only if condition is false
?>

"{" and "}" can be deleted because there is only one line in if and else statements. If you want to create many lines of script, so then you should use"{" and "}":

PHP Code:

<?php
$myname = "Smith" ;
if ( $myname == "Smith" )
{
echo "hello ! Your are Smith"; // wil be displayed only if condition is true
echo "You are wellcome";
} else
echo "hello ! Your are not Smith";// wil be displayed only if condition is false
?>

Here the "{" and "}" are necessary in the if statement, but not necessary in the else one as else statement has only one line of code.

1 comments

PHP simple if statement

If statements

if statement in php is similar to almost all languages, and it necessary to make a usefull script.

If statement enable you to execute a script only if a condition is true.

Simple if statement:

php code:

<?php
$age = 28;

if ($age == 28)
echo "hello ! Your age is 28";
?>

Display:

hello ! Your age is 28

But if you want to do many lines of code under the if statement, you should do:

php code:

<?php
$age = 28;

if ($age == 28)
{
echo "hello ! Your age is 28";
echo "
" ;
echo "You are wellcome !";
?>

Display:

hello ! Your age is 28
You are wellcome !

1 comments

PHP strpos a searching function

3-Strings

strpos() is a very usefull php function that will find a string into another string.

This function takes two parameters: the string your are searching in and the string you are searching for, and it returns the position of the first match, or false if not found.

PHP Code:

$mystring = "May 16, 1990" ;
$search = "19" ;
$pos = strpos( $mystring , $search ) ;
echo $pos ;

Display:

Note:
PHP Start from 0, so the first position is position 0 , the second is 1 ...

The searched string may also be a character, or a number that will be considered as an ASCII code of the searched character.