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Showing results for tags 'concatenate'.
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I know that usually when we concatenante in PHP we use the period . to concatenate but I have been watching a few videos and they seems to use a comma , instead of . I didn't know about the comma before and if I didn't hear it wrong the video says both would work just depend on the way you work. So I tried using comma for testing such as echo '<pre>' , print_r($var) , '</pre>'; which works fine but when I use it in a function for fun such as function dd($var){ return '<pre>' , print_r($var) , '</pre>'; } this gives me errors about the comma but if I use period as concatenate the page would not return as html tag <pre> I know that I can just use var_dump and I tried searching things like difference between , and . in php or something similiar I couldn't find a page to explain the major difference. Can someone give me a hand? Sorry if this question is too stupid though.
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I'm having a problem on how do I put primary keys whenever a user register another person. My pattern is this (batch number) + (incrementing value). For example a person named Cary register to my website and he inputted his batch number as batch 53, so his primary will become 53001. Then if another person named Josh with batch number 53 again register to my website his primary should be 53002. Then another person name Brock register but his batch is 36 so his primary should be 36001. So my solution is to get the batch number that the user inputted while they are registering then combine it with the incrementing value. My problem is how do I get the incrementing value and let the php know the next incrementing value? How do php know that the next number will be 003 or 004 or 005.
