PHP学习(6) 包含代码和嵌入PHP
包含代码 在PHP中，包含代码有四个函数，include include_once require require_once。 include和require的主要区别是，如果文件不存在require函数会抛出一个致命错误，而include只会抛出一个警告。 include include_once 以及 require require_once，其中后缀为once的表示如果代码已经包含该文件，不再再次引用该文件。 嵌入PHP 在HTML中嵌入PHP有四种方法：XML形式、SGML形式、ASP形式、脚本形式。其中ASP形式默认是不支持的，必须在PHP配置文件[PHP.ini]中，修改asp_tags为On。四种方法示例代码如下： 123456789101112 // XML形式 // SGML形式 echo 'Hello, world'; ?> // ASP形式 // 脚本形式
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Alipay PHP SDK transfer error: How to solve the problem of 'Cannot declare class SignData'?
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Explain late static binding in PHP (static::).
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