PHP使用用户提交的数据将内容写入文件[重复]

Question

This question already has an answer here:

• What is the difference between single-quoted and double-quoted strings in PHP? 10 answers

I am trying to write contents to a file with user submitted data. I have some text say "my name is" and after this text i want to write user submitted value. How do i do this? I trying to do this with code given below.

<?php
  $fname=$_POST['fname'];
  $lname=$_POST['lname'];
  $my_file='file.txt';
  $handle= fopen($my_file,'w+');
  $data= 'My fname is $name and My lname is $lname';
  $fwrite($handle,$data);
?>

When i run this code $name does not take the input value and writes as $name like

"My name is $name"

How to fix this?

</div>

Answer 1

You need to access the variable $name while writing the name to the file. The way you are doing it now does not add the value of the variable in the string. To do so you can change :

$data= 'My fname is $name and My lname is $lname';

to

$data= "My fname is $name and My lname is $lname";

The double quotes substitute the value of the variables in the string literal as it is evaluated before it is used in the expression. For more info refer this answer.

or

$data= 'My fname is '.$name.' and My lname is '.$lname;

Here, the string literal is concatenated with the value of the variables using the . operator.