PHP code for native support of the Observer Pattern <?php//Viewer mode//php (SPL) Native Support/* Class summary Splsubject {abstract public void attach (Splobserver $observer) , abstract public void detach (Splobserver $observer), abstract public void notify (void);} Splobserver {Abstract Public
1. PHP's native support for the Observer pattern is detailed in the code
Introduction: <?php//Viewer mode//php (SPL) Native Support/* Class summary Splsubject {abstract public void attach (Splobserver $observer), abstract public V OID Detach (Splobserver $observer); abstract public void notify (void)
2. Advanced Layout Tips for CSS
Introduction: With IE8 gradually exiting the stage, a lot of advanced CSS features have been natively supported by the browser, no longer learn to be outdated. Using: Empty to differentiate between null element compatibility: Not supported Ie8demo if we have the above list: <div class= "Item" >a</div><div class= "item" >b</div> <div class= "Item" ></div> we want to be able to treat empty and non-empty elements differently, then there are two
3. CSS Advanced Layout Tips
Introduction: With IE8 gradually exiting the stage, many advanced CSS features have been natively supported by the browser, and will not learn to be outdated
4. JavaScript puzzle: Large integer string addition
Summary: For the addition of two large integer strings, native support is available in many languages. Java, for example, provides the BigInteger class, and JS this aspect is not supported, the implementation depends on what we have.
5. Python gdal Tutorial: Reading raster data with Gdal
Summary: Gdal native support for more than 100 raster data types, covering all major GIS and RS data formats
6. Cross-domain technology (JSONP and Cros)
Introduction: We found that the Web page calls the JS file is not affected by whether the cross-domain, and the "src" attribute of the label has the ability to cross-domain, such as <script>, , <iframe>. That is to say that if you want to access data across domains, the server can only put the data in the JS format file. It happens that we know that JSON can succinctly describe complex data, and JSON is also supported by JS Primitives, so the client can handle the data in this format almost at will. The client can then invoke the dynamically generated JS format file on the cross-domain server in a way that is identical to the calling script. Client
7. HTML5 native support BASE64 encoding and decoding
Introduction: HTML5 Native support for BASE64 encoding and decoding
8. What is the difference between Redis and memcached?
Summary: Redis also has key-value pairs stored, can also exist in memory, but also support persistent storage, and Redis cluster, distributed deployment, mirroring synchronization is the native support, More convenient than memcached (memcached also have to write a consistency hash algorithm to determine the value of a key ...
9. CSS3 native supports high-width methods such as Div and browser _html/css_web-itnose
Introduction: CSS3 native support for high-width methods such as Div and browser
10. How to learn PHP in-depth, become a master PHP
Introduction: How To learn PHP in-depth, become a master PHP? Understand the disadvantages of PHP language design, such as the lack of UTF-8 native support no threading mechanism, lack of asynchronous mechanism to summarize the problems caused by these disadvantages, each type of problem occurred in each scenario, the processing mode, to further understand the history of PHP, Understand why the market will allow the existence of these defects Learning design patterns (program architectures) using PHP to implement a complex function is not difficult, but through the design itself allows the final implementation with high flexibility, high
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