php echo里面的javascript代码

问题描述：

This is my functional onClick script in HTML and it works perfectly:

<input type="text" id="t" name="t" value="1">
<a href="testar.php?action=" onclick="window.location=this.href+'&quant='+document.getElementById('t').value;return false;">Click</a>

What i want to achieve is this:

echo '<input type="text" value="1" id="t" name=""/>
<a href="addCarrinho.php?id_produto='.$registo['id'].'&nome='.$registo['nome'].'&preco='.$registo['preco'].'" onclick="window.location=this.href+'&quant='+document.getElementById('t').value;return false;">Add</a>';

All php works, i am receiving php variables on the other page but the onClick javaScript is not working, im getting a sintaxe error. I think its a quotes problem but im not familiarized with javaScript.

这是我在HTML中的功能onClick脚本，它运行良好： p>

  ＆lt; input type =“text”id =“t”name =“t”value =“1”＆gt; 
＆lt; a href =“testar.php？action =”onclick =“window.location = this  .href +'＆amp; quant ='+ document.getElementById（'t'）。value; return false;“＆gt; Click＆lt; / a＆gt; 
  code>  pre> 
 
 我是什么 希望实现的是： p> 
 
 
  echo'＆lt; input type =“text”value =“1”id =“t”name =“”/＆gt; 
＆lt;  a href =“addCarrinho.php？id_produto ='。$ registo ['id']。'＆amp; nome ='。$ registo ['nome']。'＆amp; preco ='。$ registo ['preco']。  '“onclick =”window.location = this.href +'＆amp; quant ='+ document.getElementById（'t'）。value; return false;“＆gt; Add＆lt; / a＆gt;'; 
  code>  
 
 所有的php工作，我在另一个页面上接收php变量，但onClick javaScript不工作，我得到一个sintaxe错误。
我认为它是一个引号问题，但我不熟悉javaScript  。 p> 
  div>

答

Change to the following:

<a href="addCarrinho.php?id_produto='.$registo['id'].'&nome='.$registo['nome'].'&preco='.$registo['preco'].'" onclick="window.location=this.href+\'&quant=\'+document.getElementById(\'t\').value;return false;">Add</a>';

答

You need to escape the single quotes in the last line like following:

...
onclick="window.location=this.href+\'&quant=\'+document.getElementById(\'t\').value;return false;"
...

答

echo '<input type="text" value="1" id="t" name=""/>
<a href="addCarrinho.php?id_produto='.$registo["id"].'&nome='.$registo["nome"].'&preco='.$registo["preco"].'" onclick="window.location=this.href+'&quant='+document.getElementById("t").value;return false;">Add</a>';

Try with this way, I did some single and double quote change.

php echo里面的javascript代码

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