This operator has similar behavior, for example strcmp() or version_compare(). This operator can be used with integers, floats, strings, arrays, objects, etc.
This operator offers combined comparison:
- Return 0 if the values on both sides are equal
- Return 1 if the value on the left is greater
- Returns -1 if the value on the right is greater
// Comparing Integers echo 1 1; // outputs 0 echo 3 4; // outputs -1 echo 4 3; // outputs 1 // String Comparison echo "a" "a"; // outputs 0 echo "m" "y"; // outputs -1 echo "y" "c"; // outputs 1
echo "Integers" ; echo 7 < = > 7; echo "" ; echo 7 < = > 6; echo "" ; echo 6 < = > 7; echo " Float " ; echo 2.5 < = > 1.5; echo "" ; echo 0.5 < = > 1.5; echo "" ; echo 1.5 < = > 1.5; echo " Strings " ; echo "a" < = > "a" ; echo "" ; echo "g" < = > "b" ; echo "" ; echo "a" < = > "b" ; echo " Arrays " ; echo [] < = > []; echo "" ; echo [1, 7, 3] < = > [1, 7, 3]; echo "" ; echo [1, 7, 3, 5] < = > [1, 7, 3]; echo "" ; echo [1, 7, 3] < = > [4, 4, 4]; echo "" ;
?> Exit : Integers 0 1 -1 Float 1 -1 0 Strings 0 1 -1 Arrays 0 0 1 -1
Link : http://php.net/manual/en/language.operators.comparison.php
