This question already has an answer here: PHP curly brace syntax for member variable 5 answers Curly braces in string in PHP 5 answers With that syntax you are able to call methods and variables of a class dynamically without knowing their respective name (also see variable variable names in the docs). /edit: updated the answer with a more sophisticated example, I hope this is easier to u
这个问题在这里已经有了答案: PHP大括号语法为成员变量5的答案 在PHP 5中的字符串大括号的答案 使用该语法,您可以在不知道各自名称的情况下动态调用类的方法和变量(另请参阅文档中的变量变量名称)。 /编辑:用更复杂的例子更新答案,我希望这更容易理解。 修正了原来的代码,这个应该实际上工作。 例: <?php class Router { // respond // // just a simple method that checks
Possible Duplicate: Curly braces in string in PHP I run into some "strange" PHP code, so instead of this: <?php echo $variable; ?> I have this one: ${variable} and I can't get how to make this to the variable: <?php echo number_format($variable, 2, ',', '.') ?> Any ideas? Thanks. EDIT: This is the actual code: <script id="productTemplate" type="text/x-j
可能重复: PHP中字符串中的大括号 我遇到了一些“奇怪的”PHP代码,所以不是这样的: <?php echo $variable; ?> 我有这个: ${variable} 我无法得到如何使这个变量: <?php echo number_format($variable, 2, ',', '.') ?> 有任何想法吗? 谢谢。 编辑:这是实际的代码: <script id="productTemplate" type="text/x-jquery-tmpl"> <?php echo "Save:"; ?> ${savings} <
Possible Duplicate: curly braces in string I still don't know what it's called. Like: $name = 'xxx'; echo "This is a string {$name}"; What do you call that operation? Concatenating a variable using {} in to a string. Thanks! This is not concatenation ; this is variable interpolation ; see the Variable parsing section, in the PHP manual. Basically, you can use any of the t
可能重复: 字符串中的大括号 我仍然不知道它叫什么。 喜欢: $name = 'xxx'; echo "This is a string {$name}"; 你称这种手术为何? 将使用{}的变量连接到一个字符串中。 谢谢! 这不是串联; 这是可变插值 ; 请参阅PHP手册中的变量分析部分。 基本上,您可以使用以下两种语法中的任何一种: echo "This is $variable"; 要么 : echo "This is {$variable}"; 在这两种情况下你都会得到相同的结果 - 除了第
Possible Duplicate: curly braces in string Just came across this piece of code and it got me curious... $msg .= "–{$mime_boundary}–n"; The $mime_boundary var was specified earlier to be output as a string. Did a quick test.... $var = "XmytextX"; $str ="some wrapper{$var}end of"; echo $str; and it does indeed output into the string. I've just never seen this way of outputting a
可能重复: 字符串中的大括号 刚刚遇到这段代码,它让我好奇...... $msg .= "–{$mime_boundary}–n"; 前面指定了$ mime_boundary var作为字符串输出。 做了一个快速测试.... $var = "XmytextX"; $str ="some wrapper{$var}end of"; echo $str; 它确实输出到字符串中。 我从来没有见过这种输出var的方式。 找不到任何文档 - 任何人都可以启发我吗? 因此,通常情况下,您可以使用双引号输出任何变量,如下所示
This question already has an answer here: Curly braces in string in PHP 5 answers It seems, there is no difference in any PHP version $foo = 'test'; var_dump("$foo"); var_dump("{$foo}"); var_dump("${foo}"); Test: https://3v4l.org/vMO2D Anyway I do prefer "{$foo}" since I think it's more readable and works in many other cases where other syntax doesn'
这个问题在这里已经有了答案: 在PHP 5中的字符串大括号的答案 看来,任何PHP版本都没有区别 $foo = 'test'; var_dump("$foo"); var_dump("{$foo}"); var_dump("${foo}"); 测试:https://3v4l.org/vMO2D 无论如何,我更喜欢"{$foo}"因为我认为它更具可读性,并适用于其他语法不适用的许多其他情况。 作为一个例子,让我们尝试使用对象属性访问: var_dump("$foo->bar"); //syntax
$str='add[sometext]{begin{equation}label{eqn:3} f_{1} = begin{cases}} beta_{1} + beta_{2}f_{2} & f_{2}leq gamma\ beta_{1} + beta_{2}gamma + beta_{4}(f_{2}-gamma) & f_{2} >gamma end{cases}sdsdssd, end{equation}} it may have some extra code here with {} end{equation}}' I need to extract the string between add[sometext]{ and } (ietill add tag end curly braces)The string between add[some
$str='add[sometext]{begin{equation}label{eqn:3} f_{1} = begin{cases}} beta_{1} + beta_{2}f_{2} & f_{2}leq gamma\ beta_{1} + beta_{2}gamma + beta_{4}(f_{2}-gamma) & f_{2} >gamma end{cases}sdsdssd, end{equation}} it may have some extra code here with {} end{equation}}' 我需要提取字符串add[sometext]{和} (ietill add tag end curly braces) add[sometext]{和}之间的字符串可能会有所不同,
I'm trying to create a module that adds new content to existing pages. For testing purposes I'm trying to add to the checkout/cart/index page, but I want a general solution as there are other pages I need to modify. I've examined the code of free extensions which achieve this by copying all the code of an existing template file into an override template and then using getChildHtml(
我正在尝试创建一个模块,为现有页面添加新内容。 出于测试目的,我试图添加到结帐/购物车/索引页面,但我想要一个通用解决方案,因为还有其他页面需要修改。 我已经研究了通过将现有模板文件的所有代码复制到覆盖模板,然后使用getChildHtml('some_block')在适当位置显示新块来实现此目的的免费扩展代码。 我想添加我的模块而不必重写任何核心模板文件,以尽可能地编译我的模块。 此线程Magento - 使用购物车
Examples mylayoutfile.xml <layout> <default> <reference name="header"> <block type="mynamespace_mymodule/view" name="mynamespace_mymodule" output="toHtml" template="mymodule/html/view.phtml"> <action method="setTest"><param1>myparam1</param1><param2>myparam2</param2></action>
例子 mylayoutfile.xml <layout> <default> <reference name="header"> <block type="mynamespace_mymodule/view" name="mynamespace_mymodule" output="toHtml" template="mymodule/html/view.phtml"> <action method="setTest"><param1>myparam1</param1><param2>myparam2</param2></action>
Possible Duplicate: where we use object operator “->” in php Reference - What does this symbol mean in PHP? I see these in PHP all the time but I don't have a clue as to what they actually mean. What does -> do and what does => do. And I'm not talking about the operators. They're something else, but nobody seems to know... The double arrow operator , => , is use
可能重复: 我们在php中使用对象运算符“ - >” 参考 - 这个符号在PHP中的含义是什么? 我始终在PHP中看到这些内容,但我不知道它们实际上的含义。 什么做->做和做什么=>做。 我不是在谈论运营商。 他们是别的东西,但似乎没有人知道...... 双箭头运算符 =>用作数组的访问机制。 这意味着它左侧的内容将在数组上下文中具有与它右侧相对应的值。 这可用于将任何可接受类型的值设置为数组的相应索引。 索
This question already has an answer here: PHP parse/syntax errors; and how to solve them? 13 answers Remove all spaces before echo (where the error occured) until semicoln of previous. Usually this issue occure if you copy paste your code from something else. Which also copy some unexpected unprintable characters while($row2=mysqli_fetch_array($result2)){ $item_id=$row2[2];
这个问题在这里已经有了答案: PHP解析/语法错误; 以及如何解决它们? 13个答案 删除echo(发生错误之处)之前的所有空格,直到前一个分号为止。 通常这个问题发生时,如果你复制粘贴你的代码。 其中也复制一些意想不到的字符 while($row2=mysqli_fetch_array($result2)){ $item_id=$row2[2]; $sql3= "SELECT * FROM issue i INNER JOIN stock s ON i.item_id=s.item_no WHERE s.item_no='$ite