![]() The last value on the last line is indeed a 2, not a 3.Īfter going through the first foreach loop, $array remains unchanged but, as explained above, $value is left as a dangling reference to the last element in $array (since that foreach loop accessed $value by reference).Īs a result, when we go through the second foreach loop, “weird stuff” appears to happen. The above code will output the following: 1,2,3 Here’s an example of the kind of evasive and confusing bugs that this can lead to: $array = įoreach ($array as &$value) // by value (i.e., copy) After the loop completes, therefore, $value still points to the last element of $array and remains in scope. On each iteration foreach sets the reference to point to the next element of $array. Thus, $value in the above example is a reference within the top scope of the script. The main thing to remember is that foreach does not create a scope. Subsequent operations involving $value could therefore unintentionally end up modifying the last element in the array. Specifically, in the above example, after the code is executed, $value will remain in scope and will hold a reference to the last element in the array. The problem is that, if you’re not careful, this can also have some undesirable side effects and consequences. Not sure how to use foreach loops in PHP? Using references in foreach loops can be useful if you want to operate on each element in the array that you are iterating over. Common Mistake #1: Leaving dangling array references after foreach loops This article highlights ten of the more common mistakes that PHP developers need to beware of. But its ease of use notwithstanding, PHP has evolved into quite a sophisticated language with many frameworks, nuances, and subtleties that can bite developers, leading to hours of hair-pulling debugging. So these are my tips on how to upload bigger files in Laravel.PHP makes it relatively easy to build a web-based system, which is much of the reason for its popularity. So there's a chance that you will never need to edit this value, but just in case, it's good to know it exists. The difference here is that Apache doesn't give any restrictions by default. ![]() If you're using Apache web-server, there's also a setting for that called LimitRequestBody. So you need to change that setting to 20m or higher. Here's a screenshot from official documentation:Īs you can see, default value is only 1m, which means that your whole POST request may be maximum 1MB. Even without knowing how to configure it, you need to care about one setting in nf file: client_max_body_size. There's also web-server configuration.īy default Laravel Forge creates servers with LEMP stack, which uses Nginx as a web-server. But even that won't allow you to upload 20 MB files, because of overall POST request restriction by post_max_size, it should be set to 20M, or rather even bigger than that, cause POST will likely to have more data than just the file, so I would set it to 21M at least, in that case.Īlso, please make sure you're editing the correct php.ini file, cause there are cases with multiple files on the same server, for different PHP versions, also for FPM and CLI settings.īut even this may be not enough. Here they are with their default values:Īs you can see, by default you can upload files only up to 2 MB, so you should change that to 20M. There are two settings related to max size in php.ini file. You can check pull request for this change here and read updated official documantation here. Since Laravel 9.22 there's new fluent file validation rule. But that may be not enough, cause file restrictions exist not only on Laravel application level. The last part means that size should be not more than 20 MB (20000 kB). In your Form Request files or validate() method you can pass array with this parameter: So decided to expand on it and explain the reason, and what to do.įirst, let's see how to validate file size in Laravel. I got this question at least a dozen times: "I'm raising my file validation rule in Laravel to 20 MB but still get errors, it doesn't work".
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