Using ifelse written in php to determine whether an error is returned?

Source: Internet
Author: User
I have never learned php. I used to learn java. I used java to write it. If $ prev_video object exists, I will output the tag. Can you tell me where the problem is?

I have never learned php. I used to learn java and write it in java,
If the $ prev_video object exists and the tag is output, let's take a look at the problem?

Reply content:

I have never learned php. I used to learn java and write it in java,
If the $ prev_video object exists and the tag is output, let's take a look at the problem?

IfA condition is missing.:

The syntax error of the amount is also sent ....................

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