In the below example, we are defining a TEXT constant with a value. Also, in the same program, we have defined a function Demo(). We have declared the TEXT constant outside the function Demo. Here we see that we can access the constant TEXT from within the function. This means once ...
Create a PHP Constant To create a constant, use thedefine()function. Syntax define(name,value); Parameters: name: Specifies the name of the constant value: Specifies the value of the constant ExampleGet your own PHP Server Create a constant with acase-sensitivename: ...
define("CONSTANT","Hello world."); echoCONSTANT;// outputs "Hello world." echoConstant;// 输出 "Constant" 并发出一个提示性信息 ?> Example #2 使用关键字 const 定义常量 1 2 3 4 5 <?php // 以下代码在 PHP 5.3.0 后可以正常工作 constCONSTANT ='Hello World'; echoCONSTANT; ?> Example ...
echo CONSTANT; // outputs "Hello world."echo Constant; // 输出 "Constant" 并发出一个提示性信息 ?> Example #2 使用关键字 const 定义常量 <？php // 以下代码在 PHP 5.3.0 后可以正常工作 const CONSTANT = 'Hello World';echo CONSTANT;?> Example #3 合法与非法的常量名 <？php ...
Case-sensitive constant nameCase-insensitive constant nameCreate a Array constant with define()Use a constant inside a function (when it is defined outside the function) Constants explained PHP Operators Arithmetic operator: Addition (+)Arithmetic operator: Subtraction (-)Arithmetic operator: Multiplicati...
Example 1The following example demonstrates how the define() function works −Open Compiler <?php define("CONSTANT", "Hello world."); echo CONSTANT; // echo Constant; ?> OutputThe first echo statement outputs the value of CONSTANT. You will get the following output −...
Function name is example In this code, we defined one function, namely "example". Theechostatement displayed the function name using__FUNCTION__constant. 5) PHP __CLASS__ Constant The__CLASS__constant represents the name of the current class. ...
支持获取动态的类常量 (dynamic class constant) 和枚举成员 (Enum member) 新增json_validate()函数,用于验证JSON 添加Random 扩展 添加mb_str_pad() 添加#[\Override]属性 新增更多 PHP Sockets 选项 增加对 cURL 7.87 及以下版本的新 cURL 选项和常量的支持 ...
<?php class C { const string SOME_CONSTANT = 'SCRIPT_LANG'; } $some_constant = 'SOME_CONSTANT'; var_dump(constant(C::class . "::{$some_constant}")); 输出是: 代码语言:javascript 代码运行次数:0 运行 AI代码解释 string(11) "SCRIPT_LANG" 在PHP 8.3 中,查找类常量的语法简化如下: 代码...
constant_name:必选参数,常量名称,即标志符。 value:必选参数,常量的值。 case_sensitive:可选参数,指定是否大小写敏感,设定为 true 表示不敏感。 以下实例我们创建一个 区分大小写的常量, 常量值为 "Welcome to runoob.com!": <?php define("GREETING","Welcome to runoob.com!");echo GREETING;?> ...