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  • How to use the HTML textarea for multiline text input
    How to use the HTML textarea for multiline text input
    TheHTMLelementisusedformultilinetextinputinwebforms,supportinglinebreaksandlargetextblocks.2.Basicattributesincludenameforformsubmission,rowsforheight,andcolsforwidth,withCSSpreferredforresponsivedesign.3.CSSpropertieslikewidth,height,padding,andresi
    HTML Tutorial . Web Front-end 694 2025-08-04 03:16:02
  • How to create a CSS-only animated hero section?
    How to create a CSS-only animated hero section?
    Create an animated hero area that uses only HTML and CSS, first build a semantic HTML structure with titles, descriptions, and buttons; 2. Use Flexbox layout and set gradient background to style hero area; 3. Use @keyframes to add a delayed fade-in slide animation for titles, descriptions, and buttons; 4. Enhance the interactive visuals of the CTA buttons through transition and hover states; 5. Optionally use background-size and animation to achieve background gradient flow effects; 6. Add media queries to ensure responsive display on mobile devices; finally, by streamlining animations and prefers-reduced-motion media
    CSS Tutorial . Web Front-end 145 2025-08-04 03:12:02
  • PHP Loop Showdown: When to Choose `while` Over `for` and `foreach`
    PHP Loop Showdown: When to Choose `while` Over `for` and `foreach`
    Usewhilewhenthenumberofiterationsisunknownanddependsonaruntimecondition,suchasreadingfromafileorstreamuntilcompletion.2.Useforwhentheiterationcountisknownandprecisecontrolovertheindexisneeded,includingcustomincrementsorreversetraversal.3.Useforeachwh
    PHP Tutorial . Backend Development 146 2025-08-04 03:09:01
  • How to Change the Default Storage Engine in MySQL?
    How to Change the Default Storage Engine in MySQL?
    CheckcurrentstorageengineswithSHOWENGINES;andidentifytheDEFAULT.2.Editmy.cnf(Linux)ormy.ini(Windows)under[mysqld].3.Setdefault-storage-engine=desired_engine(e.g.,MyISAM).4.RestartMySQLserviceusingsystemctlornetcommands.5.VerifywithSHOWVARIABLESLIKE'd
    Mysql Tutorial . Database 217 2025-08-04 02:53:01
  • How to perform a geographical search with spatial data in MySQL?
    How to perform a geographical search with spatial data in MySQL?
    To perform geographic search, you need to use MySQL's spatial data types and functions. 1. Use the POINT type to store latitude and longitude and create SPATIALINDEX of SRID4326; 2. Use the ST_Distance_Sphere function to find the location within the specified radius, in meters; 3. To improve performance, first use MBRContains combined with bounding box filtering and then calculate the exact distance; 4. When searching for points in polygonal areas, use the ST_Within function to determine whether the points are within the range; be sure to set the SRID correctly and upgrade to MySQL8.0 to obtain better spatial support, and ultimately, various geographic queries can be efficiently implemented.
    Mysql Tutorial . Database 699 2025-08-04 02:45:01
  • What is the formenctype attribute for HTML form submission
    What is the formenctype attribute for HTML form submission
    Theformenctypeattributespecifieshowformdataisencodeduponsubmissionforspecificsubmitbuttons,overridingtheform'senctype.2.Itappliestoinputtype="submit",inputtype="image",andbuttontype="submit"elements.3.Itonlyworkswhenthef
    HTML Tutorial . Web Front-end 392 2025-08-04 02:34:02
  • How to serve responsive images with the srcset attribute in HTML
    How to serve responsive images with the srcset attribute in HTML
    Use the srcset attribute to effectively provide responsive images, improving page loading speed and user experience. 1. The srcset attribute allows you to define multiple image sources and width or pixel density prompts, so that the browser can select the most suitable image; 2. Combining the sizes attribute, it can provide more accurate image selection based on layout changes, such as the percentage of the image occupying the viewport under different screen widths; 3. Pixel density descriptors (such as 1x, 2x) can be used for high-definition images; 4. Always retain src as a fallback option for old browsers; 5. Use width descriptors (w) when the image is scaled with the viewport, and density descriptors (x) for fixed-size images; 6. All image versions should be optimized to save bandwidth; 7. Pass the device test or developer
    HTML Tutorial . Web Front-end 250 2025-08-04 02:22:02
  • How to Handle Character Sets and Collations in MySQL?
    How to Handle Character Sets and Collations in MySQL?
    Use utf8mb4 and appropriate collations to correctly handle multilingual text in MySQL. 1. Understand character sets (such as utf8mb4 supports all Unicode characters) and collation rules (such as utf8mb4_unicode_ci is a case-insensitive Unicode sort, and utf8mb4_bin is a binary case-sensitive); 2. Set default character sets and collation rules through configuration files at the server level; 3. Specify character sets and collation rules when database creation or modification; 4. Define character sets and collation rules when table creation or conversion; 5. Specify as needed at the column level, for example, use utf8mb4_bin in password fields; best practices include always using utf8mb4 instead of
    Mysql Tutorial . Database 646 2025-08-04 02:15:00
  • Automating MySQL Schema Migrations with Flyway or Liquibase
    Automating MySQL Schema Migrations with Flyway or Liquibase
    Flyway and Liquibase are database automation migration tools that solve problems that are prone to errors, omissions and version confusion in manual operations. Flyway is designed with "convention over configuration" and recognizes SQL files through naming rules. It is suitable for simple scenarios. The advantages are low learning costs and easy integration. Liquibase supports XML/YAML/JSON and other formats, and provides changeSet and rollback functions, which are suitable for complex projects and multi-database environments. When choosing, it should be determined based on project complexity, team technology stack and process requirements. The key is to establish a stable migration process.
    Mysql Tutorial . Database 182 2025-08-04 02:13:01
  • How to use the CSS text-align-last property?
    How to use the CSS text-align-last property?
    text-align-last is used to control the alignment of the last line of text or text before the newline in a block-level element. 1. By default, the last line of text-align:justify is left aligned, while text-align-last can override this behavior; 2. Supported values include auto, left, right, center, and justify; 3. It can be used for the last line or before the paragraph; 4. Common uses include centering the last line of the paragraph, right aligning the signed line, etc.; 5. Most modern browsers support this property, but pay attention to the compatibility of old browsers; 6. It is a powerful tool to achieve fine layout effects, especially suitable for scenarios where text needs to be improved.
    CSS Tutorial . Web Front-end 523 2025-08-04 01:55:00
  • How to use HTML header and footer elements
    How to use HTML header and footer elements
    Use and can provide semantic structure for web pages to improve accessibility, SEO and code maintainability; 2. Used to define introductory content of pages or chapters, such as titles, navigation, author information, etc., which can be used in the page and article many times; 3. Used to define ending content, such as copyright information, contact information, and author information, which can also exist independently in the page and each; 4. Both should be used based on semantics rather than visual layout, avoiding only for style control or incorrect nesting; 5. Correct use of CSS and other semantic tags (such as,) will help improve screen reader recognition and search engine optimization effects, and ultimately achieve a clear structure and clear meaning web design.
    HTML Tutorial . Web Front-end 372 2025-08-04 01:34:01
  • A Guide to Modifying Arrays of Objects in PHP
    A Guide to Modifying Arrays of Objects in PHP
    ArraysofobjectsinPHPcontainclassinstances,allowingdirectpropertyormethod-basedmodifications;2.Updatepropertiesusingforeachloopssinceobjectsarepassedbyreference,orusesettersforencapsulatedproperties;3.Filterobjectswitharray_filter()tocreatesubsetsbase
    PHP Tutorial . Backend Development 571 2025-08-04 00:38:00
  • Unlocking Modern PHP: The Power of Array Destructuring
    Unlocking Modern PHP: The Power of Array Destructuring
    Array deconstruction is an important feature introduced by PHP7.1, allowing values to be extracted from arrays and assigned directly to variables, improving code readability and simplicity. 1. The basic syntax uses [$a,$b]=$array to implement position deconstruction; 2. PHP7.1 supports associative array deconstruction, such as ['name'=>$name]=$user, key name matching; 3. From PHP8.1, it can be deconstructed in foreach, such as foreach($usersas['name'=>$name,'email'=>$email]); 4. The optional fields can be processed in combination with default values, such as ['location'=>$loc='Unknow
    PHP Tutorial . Backend Development 1000 2025-08-04 00:34:01
  • Mastering Nested Loop Control with PHP's `continue n`
    Mastering Nested Loop Control with PHP's `continue n`
    Continuen is used to skip the specified outer loop iteration in multi-layer nested loops; 1. Use continuen to skip the inner loop and directly enter the next iteration of the outer loop, such as continue2 skipping the current inner loop and continuing the outer loop; 2. In matrix processing, if a row has a specific value (such as 0), continue2 can skip the entire row to improve efficiency; 3. When analyzing nested data structures, if invalid data is found in the inner layer, continueuen can skip the corresponding parent loop; 4. Avoid overuse, especially continue3 and above, and nesting should be reduced through function splitting; 5. Although PHP does not support loop tags and requires manual counting of levels, conti is used reasonably
    PHP Tutorial . Backend Development 914 2025-08-04 00:31:00

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