PHP中的三元运算符

Question

Why this code do not want to work ?

<?php
$currMonth='01';
?>

<a class="btn btn-xs btn-<?php ($currMonth=='01') ? 'primary' : 'default'; ?>-outline">

My output is empty:

<a class="btn btn-xs btn--outline">

Thanks.

Answer 1

It is working. It is just not outputting something because you haven't told php to do so. Change <?php to eg <?php echo .

Answer 2

please use following code...

"echo " is missing

<?php
$currMonth='01';
?>

<a class="btn btn-xs btn-<?php echo ($currMonth=='01') ? 'primary' : 'default'; ?>-outline">

Answer 3

You can use <?= this operator

<a class="btn btn-xs btn-<?= ($currMonth=='01') ? 'primary' : 'default'; ?>-outline">

or use echo as other suggested

You can read more about it on site below

http://php.net/manual/en/function.echo.php

echo also has a shortcut syntax, where you can immediately follow the opening tag with an equals sign. Prior to PHP 5.4.0, this short syntax only works with the short_open_tag configuration setting enabled.

Answer 4

没有输出字符串的功能！

<?php echo ($currMonth=='01') ? 'primary' : 'default'; ?>

Answer 5

Try this and your code will work:

<?php
$currMonth='01';
?>

<a class="btn btn-xs btn-<?php echo ($currMonth=='01') ? 'primary' : 'default'; ?>-outline">

Answer 6

This is a simple solution

<?php
$currMonth='01';
?>

<a class="btn btn-xs btn-<?php echo ($currMonth==='01') ? 'primary' : 'default'; ?>-outline">Test</a>