PHP7 New Operator Usage Example Analysis _php skill

The examples in this article describe the use of PHP7 new operators. Share to everyone for your reference, specific as follows:

NULL merge operator

is actually a modification of the ternary operator, reducing the amount of code

Original Practice
//$lig = Isset ($_get[' Lig ')? $_get[' Lig ']: ' Bee ';
$lig = $_get[' Lig ']?? ' Bee ';
Echo $lig;

The Operation effect chart is as follows:

Spacecraft operator (combination comparison)

The essence is the size comparison character, but compared to the ' < ', ' > ' return value is more than 1, and Java string comparison CompareTo () function similar

<?php
Echo 1<=>1.1;
Print (php_eol);/newline character
echo "<br>";
Print (1.1<=>1);
echo "<br>";
echo 1<=> ' 1 ';

The Operation effect chart is as follows:

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