if statment

something practical

You can have 'nested' if statements withing a single if statement, using additional parenthesis. 
For example, instead of having: 

<?php if( $a == 1 || $a == 2 ) {
    if( $b == 3 || $b == 4 ) {
        if( $c == 5 || $ d == 6 ) {
             //Do something here.
        }
    }
} ?> 
You could just simply do this: 

<?php if( ($a==1 || $a==2) && ($b==3 || $b==4) && ($c==5 || $c==6) ) {
    //do that something here. } ?> 






You can do IF with this pattern :
<?php
$var = TRUE;
echo $var==TRUE ? 'TRUE' : 'FALSE'; // get TRUEecho $var==FALSE ? 'TRUE' : 'FALSE'; // get FALSE?>



<?php
// validate alphanumeric 
$input="gfghfhfhgg1223445-5";
if(preg_match('/^[a-zA-Z]+[a-zA-Z0-9-]+$/', $input))
{
    echo "valid statment";
}
else
{
    //invalid
    echo "non valid statment";
}

?>