Backend DevelopmentPHP TutorialAdd ternary operator to the array output by the template to judge, array operator_PHP tutorial
Add ternary operator to the array output by the template for judgment. Array operator
provides a useful judgment method. Add ternary operation to the array output by the template. It is very convenient to judge by using the talisman. Of course you can also use Ajax~
<span><html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>无标题</title>
</head>
<body><span>
我的口号是什么？——</span>><{<span>$data</span>['user']?'没有问题':Wow搞大了}> <br/> //提醒：三元运算符不能接受符号，不然会报错！
<{<span>$data</span>['email']}> <br/>
<{<span>$data</span>['address']}><br/>
<{<span>$data</span>['num']+10}><br/>
</body>
</html></span>
Controller methods
<span><?php</span><br /><span>namespace Home\Controller;</span><br /><span>use Think\Controller;</span><br /><span> <span>public</span> <span>function</span><span> index(){
</span><span>$data</span>['user']='我爱的是你爱我'<span>;
</span><span>$data</span>['email']='integer@gmail.cn'<span>;
</span><span>$data</span>['address']='中国大陆'<span>;
</span><span>$data</span>['num']='21'<span>;
</span><span>//</span><span>$this->assign('num',10);</span>
<span>$this</span>->assign('data',<span>$data</span><span>);
</span><span>$this</span>-><span>display();
}</span></span>
Ternary operator? :
For example: i= 2 > 3 ? 0 : 1
2 is greater than 3, if so, get i = 0; otherwise i=1.
Choose B
Ternary operator
is often used for relational comparison, mainly for There are only two states of the comparison relationship (greater than and not greater than, true and false)
First find the value of expression 1, if it is true, then execute expression 2 and return the result of expression 2; if the expression If the value of Formula 1 is false, then Expression 3 will be executed and the result of Expression 3 will be returned
. For example, the following expression:
a>0? a++: (a = 1)
When a>0 is When true, a++ is executed, and the value of the entire expression is equal to the value of expression a++.
When a>0 is false, a=1 is executed, and the value of the entire expression is equal to the value of expression a=1.
Reference: zhidao.baidu.com/question/341063017.html
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