我用php mysql写的留言本_PHP
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What does the width of html mean?
Jun 03, 2021 pm 02:15 PM
In HTML5, width means width. The width attribute defines the width of the element's content area. You can add inner margins, borders, and outer margins outside the content area. You only need to set "element {width: value}" to the element.
php提交表单通过后,弹出的对话框怎样在当前页弹出,该如何解决
Jun 13, 2016 am 10:23 AM
php提交表单通过后,弹出的对话框怎样在当前页弹出php提交表单通过后,弹出的对话框怎样在当前页弹出而不是在空白页弹出？想实现这样的效果：而不是空白页弹出:------解决方案--------------------如果你的验证用PHP在后端，那么就用Ajax；仅供参考：HTML code
where is linux printf
Mar 10, 2023 am 09:05 AM
linux printf is used in the command line. This command is used to format print data; the command format of printf is "printf FORMAT [ARGUMENT]...printf OPTION", where the "help" option means displaying help information, and the "version" option means Display version information.
What are the methods for expressing width value in css?
Nov 13, 2023 pm 05:47 PM
Methods include pixel value, percentage, em unit, rem unit, vw/vh unit, auto, fit-content, min-content, max-content. Detailed introduction: 1. Pixel value (px): The pixel value is fixed, and its width remains unchanged no matter how the screen resolution changes. For example: width: 300px; 2. Percent (%): The percentage width is relative to the width of the parent element. For example: width: 50%; 3, em unit, etc.
The difference between fprintf and printf
Nov 28, 2023 am 10:48 AM
The difference between fprintf and printf is that the output destination is different. printf outputs to the standard output stream, while fprintf outputs to the specified file stream. Select the appropriate function to perform output operations as needed. It should be noted that the fprintf function needs to open the file through the fopen function first, and close the file through the fclose function after use. In addition, if the file opening fails or an operation error occurs, error handling is required.
What is the difference between putchar and printf
Aug 22, 2023 pm 01:55 PM
The difference between putchar and printf: 1. The parameter type of putchar is int, and the parameter type of printf is string; 2. putchar can only output one character, and printf can output multiple characters; 3. putchar cannot format output, but printf can format it. output; 4. putchar has no return value, printf returns the number of characters successfully output; 5. putchar outputs to the console, printf is not limited to output to the console; 6. performance, etc.
How to add name to setup in Vue3
May 13, 2023 am 09:40 AM
What is the use of name in Vue3? 1. Name needs to be defined when making recursive components. 2. The component can be cached with keep-aliveincludeexclude. 3. When Vue reports an error or is debugging, you can see the name of the component. Vue3 defines name1. It is automatically generated as long as the setup syntax sugar mode single file component is turned on in the script. The corresponding name option will be automatically generated based on the file name. For example, Tree.vue, then its name will be automatically generated by Tree. This has a drawback. If you want to modify the name, you need to modify the component name. If there is a place to import the component, you need to modify it together. 2. Open a script to define name
What should I do if php cannot get the name?
Nov 24, 2022 am 09:56 AM
PHP cannot get the name because when the name and id values of the form element are different, the browser cannot recognize it. The solution: 1. Check whether some form elements and frame elements use name; 2. Check only Elements that can be assigned ID but not name; 3. For multi-select box checkbox, you can use "join(',', $__POST['name'])" to form data.
