How to abbreviate the ternary operator in php

Today I discovered a small usage of PHPternary operation operator. This gives my dry brain a little fun!

PHP TernaryOperator is a concise main usage when assigning parameters. A main usage: PHP ternary operator allows you to describe the judgment code in one line of code, thereby replacing something like The following code:

<?phpif (isset($value)) {    $output = $value;
} else {    $output = &#39;No value set.&#39;;
}

Use the following code instead:

<?php$output = isset($value) ? $value : &#39;No value set.&#39;;

The second code example is a very concise usage, which is very practical in many situations (not all) Usage. There is a lot of debate about whether you should use the ternary operator; let me say, it is a tool, just like any other tool, it is just used correctly or not.

The commonly used syntax is (expression)? value if truthy: value if falsy. This expression can be a variable, test whether this variable is true or false:

<?php$output = $value ? $value : &#39;No value set.&#39;;

The problem is: The above example is very It’s commonly used but also a bit annoying to repeat: writing $value twice feels like a mistake.

Fortunately, today I found a more concise usage introduced inPHP 5.3 The syntax of the ternary operator. You can learn it from the manual, but here we can make the above example more concise:

<?php$output = $value ?: &#39;No value set.&#39;;

This one looks familiar, because it is very similar to other shorthand operators ; When concise code, this way will look clearer, we

should

write like this,

(and this feature allows us to use this operator in many situations

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