PHP Exercise : Different datatype comparison in PHP

Write a program to compare between things that are not integers.

Suppose the strings are -

$str1 = "00004";
$str2 = "008";
$str3 = "00007-STR";

Solution

The comparison operators work for strings as well as numbers. PHP has automatic type conversions that can lead to counter intuitive results when the strings are interpretable as numbers. If you compare a number with a string or the comparison involves numerical strings, then each string is converted to a number and the comparison performed numerically.


<?php 
	$str1 = "00004";
	$str2 = "008";
	$str3 = "00007-STR";
	
	if($str2 < $str1) {
		echo "$str1 is less than $str2<br/>";
	}
	if($str3 < $str2) {
		echo "$str3 is less than $str2<br/>";
	}
	if($str1 < $str3) {
		echo "$str1 is less than $str3<br/>";
	}
?>

Output of the above code

00007-STR is less than 008
00004 is less than 00007-STR




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