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PHP IF ELSE statement script and example code

PHP IF statement is popular and is used to check some conditions and accordingly statements are executed. We can control the html display part also by the IF STATEMENT. Here is one simple example of if statement.

$j = 5;
$k = 10;
if ($j < $k){
print "Variable $j value is less  than $k";
}

We can add ELSE condition to the above statement and that part will be executed once the if condition does not satisfy. 

$j = 10;
$k = 5;
if ($j < $k){
print "Variable $j value is less  than $k";  // This line will not be executed
} else{
print "Variable $j value is greater  than $k"; // This line will be executed
}

If we are checking the different values of a variable which can have more than two conditions then for each case using PHP IF STATEMENT for matching conditions  is not a good idea. In such a case  PHP SWITCH STATEMENT  is to be used.  
One of the important use of PHP IF STATEMENT  is when inside a php script we want to display LOG IN or LOG OUT links.
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