The use of the PHP question-mark expression

The existing variable, which may be of a time type, may be a Unix timestamp, i.e. $time = '2011-12-25 00:11:20';Or $time = 1324742400.

Now I want to make a transformation of unity, that is 时间类型 , if it is, it is converted to a Unix timestamp by a strtotime($time) function, if not the same function strtotime($time) will return false .

Then I use question mark expression $time = strtotime($time) ? strtotime($time) : $time; can achieve this demand, there is no more concise form ah, always feel that others do not write it?

Reply content:

The existing variable, which may be of a time type, may be a Unix timestamp, that is, $time = '2011-12-25 00:11:20'; or $time = 1324742400 .

Now I want to make a transformation of unity, that is 时间类型 , if it is, it is converted to a Unix timestamp by a strtotime($time) function, if not the same function strtotime($time) will return false .

Then I use question mark expression $time = strtotime($time) ? strtotime($time) : $time; can achieve this demand, there is no more concise form ah, always feel that others do not write it?

The main reason why people don't write like this is that if you do this time , you can do two functions if it's actually a time format strtotime .
You can use temporary variables to solve this problem

$temp = strtotime($time);$time = $temp ? $temp : $time;

If PHP is above 5.3, you can also use

$time = strtotime($time) ?: $time;

There's a place in your question. I'm not sure, if it's a string timestamp, must the format be the Y-m-d H:i:s format?

$time = is_numeric($time) ? $time : strtotime($time);

In fact, there is no need for ternary operators, directly using && can be

