warning: division by zero

2018-06-03 12:08:39

I am using the following static method for sending mail alerts, but its throwing an error: warning:division by zero ...

Postman::MailAlert($_POST['email'],'Hello '.$_POST['name'].', Thanks for signing up.Your customer id is '.$_POST['city']/'/'.$product_id.'.');

I have solved this issue by putting @, but why is this issue raised, and what am I doing wrong?

Just the problem part:

$_POST['city']/'/'.$product_id.'.');

Need to change like this.

$_POST['city'] . '/'.$product_id.'.');

Near the end of that line of code:

[...]$_POST['city']/'/'[...]

Add some spaces to make it clear:

[...] $_POST['city'] / '/' [...]

You're trying to divide $_POST['city'] by '/' . If non-numeric strings ( '/' ) are interpreted by PHP as having a numeric value of 0, then you're dividing by 0.

Maybe you meant to concatenate instead of divide?

$_POST['city']/'/'应该变成$_POST['city'].'/' ， $_POST['city'].'/'

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