PHP的语法糖是一种简化代码和提高可读性的特性,以下是一些常见的PHP语法糖:空合并运算符(Null Coalescing Operator):使用??来简化判断变量是否存在且非空的操作。例如:$name = $_GET['name'] ?? 'Guest';合并赋值运算符(Concatenation Assignment Operator):使用.=来合并并赋值字符串。例如:$message .= 'Hello...
'value'; In the long run, this code could be a bit difficult to maintain. So, aiming to help developers to write more intuitive code, this RFC proposes the introduction of the null coalescing assignment operator (??=). So, instead of writing the previous code, we could write the followi...
非空赋值运算符(Null Coalescing Assignment Operator) // 下面几行代码完成相同功能 $this->request->data['comments']['user_id'] = $this->request->data['comments']['user_id'] ?? 'value'; // 使用非空赋值运算符,替代上面的方法 $this->request->data['comments']['user_id'] ??= 'value'...
OperatorNameExampleResultTry it ?: Ternary $x = expr1 ? expr2 : expr3 Returns the value of $x.The value of $x is expr2 if expr1 = TRUE.The value of $x is expr3 if expr1 = FALSE Try it » ?? Null coalescing $x = expr1 ?? expr2 Returns the value of $x.The value of...
非空赋值运算符(Null Coalescing Assignment Operator) // 下面几行代码完成相同功能 $this->request->data['comments']['user_id'] = $this->request->data['comments']['user_id'] ?? 'value'; // 使用非空赋值运算符,替代上面的方法 $this->request->data['comments']['user_id'] ??= 'value'...
Use the null coalescing operator to provide a fallback when a property is null: $paymentDate = $invoice->paymentDate ?? Date::now(); It also works nested: $input = $data['few']['levels']['deep'] ?? 'foo'; 7.4 You can use the null coalescing assignment operator to write the ...
Conditional Assignment Operators These Operators are used to assign the values in a variable based on a condition. Examples can be the Ternary Operator (?) and Null coalescing operator (??). Example php <!DOCTYPE html><?php $ninja1 = 10; $ninja2 = 5; // Arithmetic operators echo "...
非空赋值运算符(Null Coalescing Assignment Operator) // 下面几行代码完成相同功能 $this->request->data['comments']['user_id'] = $this->request->data['comments']['user_id'] ?? 'value'; // 使用非空赋值运算符,替代上面的方法 $this->request->data['comments']['user_id'] ??= 'value'...
<break lines="1" section="null_coalesce_assign"/><blurb fontsize="1em" align="left">Null Coalescing Assignment Operator</blurb><example fontsize="1em" result='0' title="" type=""><![CDATA[<?php$this->config['value'] = $this->config['value'] ?? 'default_value';...
How to use the conditional operator How to use the null coalescing operators How to code switch statements How to code match expressions How to use a switch statement in the controller How to code the iteration structures How to code while loops How to code do-while loops How to code for ...