SELECT tg.id,tg.name FROM trd_goods tg LEFT JOIN trd_goods_tag_relation tgt ON tg. id = tgt. goods_id this is my sql statement, if 50 pieces of data on the left and 100 pieces of data on the right, it is an one-to-many relationship. If I have a...
the ". " here. What does it mean? What is the writing method? I would like to ask you to explain in detail ....
the object of complaint in the picture is submitted by the user in the form. How to use php to extract keywords (company abbreviation) and store them in mysql database. When checking the data, you can get grouped data through this abbreviation. The p...
now there is an ajax local refresh, which I want to write. Concatenate a string on the server and return it to the client, but it is illegal to write like this, how to write it better? I have tried. The ternary operator is fine, but it is not suitable f...
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is_dir (): open_basedir restriction in effect. File ( ) is not within the allowed path (s): ( home www.abc.com public: home www.abc.com : proc : tmp) shouldn t the key File ( ) point to runtime cache, how can it become , I print var_dump (RUNTIME_P...
how to upload jpg format images of d disk under windows to the server in batch via thinkphp ...
everything else is good, why can t you pay? focuses on building an easy-to-use framework, rapid development, efficient and flexible, and takes into account the iteration of system complexity and changeable requirements in terms of architecture. Clear ...
get different responses to the same interface address of laravel online curl environment curl ,503, ...
1. Develop the official account payment of Wechat Mall, and the front end initiates the order from the ajax request to the server. The server then initiates the payment after obtaining the openid. A cross-domain exception occurred in the first step of o...
how php should call the same API? concurrently Generally speaking, how do people realize it? If you want to pass concurrent requests, do a stress test ...
when learning namespaces, I encounter a pit, that is, when some of these methods are defined but cannot be found without namespaces <?php class A { function index () { function asd (){} var_dump(function_exists( asd )); } ...
I wrote one after the user uploaded the video and selected it $( input[type=file] ).change(function() { var input = $(this); if(!!this.files && !!this.files[0]) { var reader = new FileReader(); reader.onload = functi...
A div contains a table,table with fixed content and content passed by the server, which is displayed through traversal. If traversing too much content exceeds the height of the div, this is how to get the excess html content to the table display in the ...
A large binary tree with uncertain tree hierarchy. Now we need to realize the following requirements: 1. Record hierarchical relationships. For example: to give you a node id:9, needs to find out the son or grandson under this node, or. Or all descenda...
windows server 2012. Nginx is used for load balancing on physical machines. Databases stored by session are all connected to the same database. Apache and nginx of session on physical machines can be Synchronize, while apache,session of virtual machines ...
I took a look, first create a swoole_server, and then bind the swoole_table to it feels more troublesome than redis ...
I use laravel to load a self-written class studenthelper, to obtain third-party website resources through curl. Synchronize queue parameters are passed normally, in asynchronous mode, and the parameters cannot be passed into the handle. of the job class...
I write header in the HTTP response header of IIS. How do I set up multiple domain names? Setting * is too unsafe the backend is written by php, but header will report an error when written in php, so it can only be written in IIS . ...
the folder where my class is located is named user-register,. This folder contains a -, and then I report an error when I use the class under this folder in other php files, as shown in the following figure, the Laravel framework I use: if you real...
one step of the installation-free version is mysqld -install someone will use mysqld install some people will use . mysqld --install I don t know what the difference is and why they all succeed. ...
can the thinkphp; I use in the development of websocket use a routing address directly, such as Wechat ws: cs.com worker cs. I can see that the ports are used in the tutorials demo of php and node. I would like to ask whether php can be used in this way...
vue2.0 uses axios to request data, gets the request data in the callback function, and then assigns a value to the variable to loop, but the rendering is invalid. If I write the data to death, I can render it successfully. here is the code <temp...
these days, while learning the vuex source code, I see a in the logger.js file. The parameter in the function createLogger does not understand this. Does it mean that the object in the parameter is an empty object by default, and why the attribute i...
for example, program: < H1 > include < stdio.h > < H1 > < H1 > include < unistd.h > < H1 > int main () { int cntr = 0; while (1) { sleep (1); cntrPP; printf ( "cntr =% dn ", cntr); } After } is compiled into a getpsdata file, then passes thr...