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- How to use the formaction attribute on an HTML button
- Theformactionattributeoverridesaform'sdefaultactionURLwhenabuttonisclicked.2.Itisusedonsubmitbuttonstodirectformsubmissionstodifferentendpointslike"SaveDraft"or"Publish".3.Itonlyworkswithorinsidea.4.Youcancombineformactionwithform
- HTML Tutorial . Web Front-end 430 2025-08-02 12:13:02
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- How to use the CSS backdrop-filter property?
- Backdrop-filter is used to apply visual effects to the content behind the elements. 1. Use backdrop-filter:blur(10px) and other syntax to achieve the frosted glass effect; 2. Supports multiple filter functions such as blur, brightness, contrast, etc. and can be superimposed; 3. It is often used in glass card design, and it is necessary to ensure that the elements overlap with the background; 4. Modern browsers have good support, and @supports can be used to provide downgrade solutions; 5. Avoid excessive blur values and frequent redrawing to optimize performance. This attribute only takes effect when there is content behind the elements.
- CSS Tutorial . Web Front-end 553 2025-08-02 12:11:00
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- The Hidden Copy: How foreach Handles Array Pointers by Default
- Foreach operates by default in PHP as a copy of the array rather than the original array, which means that the loop uses an independent internal pointer, which is not affected by the original array pointer state, and the modification of the original array during the loop usually does not change the iteration process; 1. At the beginning of the loop, PHP creates an implicit copy of the array, ensuring that iteration starts from the first element, and ignores the previous operations of the original array pointer such as next() and reset(); 2. Although large arrays optimize memory due to the copy-on-write mechanism, there is still potential memory overhead; 3. Modifying the original array (such as adding elements) in the loop will not affect the number of elements and traversal content of the current loop, because iteration is based on the initial snapshot; 4. Using references (&) can avoid copying and directly modifying
- PHP Tutorial . Backend Development 397 2025-08-02 12:07:02
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- Preserving Key-Value Associations: A Guide to `asort`, `arsort`, and `ksort`
- asort()sortsbyvalueinascendingorderwhilepreservingkeys,arsort()sortsbyvalueindescendingorderwhilepreservingkeys,andksort()sortsbykeyinascendingorderwhilepreservingvalues;thesefunctionsmaintainkey-valueassociationsunlikesort()orrsort(),makingthemideal
- PHP Tutorial . Backend Development 845 2025-08-02 11:53:01
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- Securing MySQL Data at Rest with Encryption
- MySQL data at rest is mainly implemented in three steps: 1. Enable InnoDB tablespace encryption, configure my.cnf parameters such as innodb_encrypt_tables=ON and set the encryption algorithm AES-CBC, but the old table needs to be manually migrated; 2. Encrypt the data directory at the file system layer, use LUKS, eCryptfs or cloud services such as AWSEBS to encrypt the disk, overwrite the logs and temporary files; 3. Implement key management policies, adopt external KMS such as AWSKMS or HashiCorpVault to avoid key leakage, rotate regularly and separate the master key and table key, ensuring that even a single key leak does not affect overall security.
- Mysql Tutorial . Database 344 2025-08-02 11:48:01
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- How to create a smooth scrolling anchor link with CSS?
- To achieve smooth scrolling anchor links, just use scroll-behavior:smooth in CSS; 1. Add html{scroll-behavior:smooth;} to the html element to enable global smooth scrolling; 2. Ensure that the href attribute of the anchor link points to the correct ID in the page; 3. If scrolling in a specific container, apply scroll-behavior:smooth to the container with fixed height and overflow; 4. The scroll offset of the target element can be adjusted through scroll-margin-top to avoid fixed head occlusion; this method does not require JavaScript, is compatible with modern browsers, and does not support IE.
- CSS Tutorial . Web Front-end 119 2025-08-02 11:43:01
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- How to define the base URL for all relative URLs in an HTML page
- To define the base URL of all relative URLs in the HTML page, you need to use elements in part; 1. It will be placed in, so that all relative links are parsed based on the URL; 2. You can add the target="_blank" attribute to make all links open in the new tab page by default; 3. Note that each page can only have one tag and must be located in, the relative path in CSS is not affected by it, and relative requests from JavaScript may also need additional processing; 4. It is suitable for scenarios where the site is located in a subdirectory, a single page application or a server to generate HTML. All relative URLs are affected by it after setting, so you need to ensure that the base URL is correct.
- HTML Tutorial . Web Front-end 732 2025-08-02 11:28:02
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- How to specify the author of an HTML document?
- To specify the author of an HTML document, you need to use a tag and set the name="author" attribute to place it in a section; 1. Use to define the author; 2. If there are multiple authors, you can use multiple tags or listed in a comma-separated content; 3. The tag must be located inside and cannot be placed in it; 4. Metadata will not be displayed on the page, but can be used for SEO and document management; 5. It can be used in combination with other meta tags such as description and keywords to enhance information integrity. This method complies with HTML standards and is widely supported.
- HTML Tutorial . Web Front-end 693 2025-08-02 11:22:02
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- How to Back Up and Restore a MySQL Database?
- TobackupaMySQLdatabase,usemysqldumpwiththesyntaxmysqldump-u[username]-p[database_name]>backup_file.sql,whichcreatesaSQLfilecontainingallnecessarycommandstorecreatethedatabase,andincludeoptionslike--databases,--all-databases,or--routinesasneeded;al
- Mysql Tutorial . Database 302 2025-08-02 11:15:02
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- Advanced Conditional Skipping: Creative Uses of `continue` in PHP
- Usecontinuetofilterunwantedelementsearly,reducingnestingandimprovingreadability;2.Usecontinue2toskipouterloopiterationsinnestedloops,avoidingflagsorcomplexbreaklogic;3.Applycontinuewithdynamicconditionsfromconfigurationtomakeloopsflexibleandreusable;
- PHP Tutorial . Backend Development 649 2025-08-02 11:06:01
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- How to structure a blog post with article and section tags in HTML
- When using semantic HTML structure blog posts, you should use and tags to improve readability, accessibility, and SEO. 1. Use tags to wrap the entire blog, indicating that this is an independent, self-containable content; 2. Use tags internally to chunk the content by topic, each should contain a title (such as) to form a clear structure; 3. Avoid using it as a style container, which should be used at this time; 4. Use and define the head and tail information of the article in the appropriate position; 5. Use, combine, and other semantic tags to enhance the meaning of the content. Proper use of these tags can help browsers, screen readers, and search engines better understand content hierarchy, thereby improving overall user experience and content accessibility.
- HTML Tutorial . Web Front-end 395 2025-08-02 11:05:02
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- How does the CSS box model work?
- TheCSSboxmodelconsistsoffourlayers:content,padding,border,andmargin,withcontentatthecenterandmarginastheoutermostlayer.2.Bydefault,widthandheightapplyonlytothecontentarea,andpadding,border,andmarginareaddedoutside,butusingbox-sizing:border-boxinclude
- CSS Tutorial . Web Front-end 141 2025-08-02 11:02:00
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- How to generate a series of numbers or dates in MySQL?
- TogenerateaseriesofnumbersinMySQL8.0 ,usearecursiveCTE:WITHRECURSIVEnumbersAS(SELECT1ASnUNIONALLSELECTn 1FROMnumbersWHEREn
- Mysql Tutorial . Database 783 2025-08-02 10:53:01
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- The Art of Merging: `array_merge` vs. the Union Operator ` `
- The main difference between array_merge() and union operator ( ) is the way to deal with key conflicts and indexes: 1.array_merge() will re-index the numeric keys and overwrite the repeated string keys with the values of the subsequent array; 2.union operator ( ) will retain the value of the left array and do not re-index, which is suitable for setting the default value. Which method should be used according to whether the original value needs to be covered or retained. The two have applicable scenarios rather than advantages and disadvantages.
- PHP Tutorial . Backend Development 117 2025-08-02 10:50:01
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