How to echo element of associative array in string?

I know It's a very basic question but I have to ask.

I have an associative array let's say it is:

 $couple = array('husband' => 'Brad', 'wife' => 'Angelina');

Now, I want to print husband name in a string. There are so many ways but i want to do this way but it gives html error

$string = "$couple[\'husband\'] : $couple[\'wife\'] is my wife.";

Please correct me if I'm using a wrong syntax for backslash.

Your syntax is correct.

But, still you can prefer single quotes versus double quotes.

Because, double quotes are a bit slower due to variable interpolation.

(variables within double quotes are parsed, not the case for single quotes.)

A more optimized and cleaned version of your code:

$string = $couple['husband'] .' : ' . $couple['wife'] .' is my wife.';

Using output formatting string function such as printf

<?php printf("%s : %s is my wife.", $couple['husband'], $couple['wife']); ?>

If you want store the output in a variable, you have to use sprintf.

try this

 <?php $string = $couple['husband']." : ". $couple['wife']." is my wife."; 
  echo  $string//Brad : Angelina is my wife.
 ?>

To use array in a string, you need to use {}:

$string = "{$couple['husband']} : {$couple['wife']} is my wife.";

Otherwise the parser cannot properly determine what you are trying to do.

You can simply do:

$string = "{$couple['husband']} : {$couple['wife']} is my wife.";

Or:

$string = $couple['husband'] . " : " . $couple['wife'] . " is my wife.";

Try like

$string = $couple['husband']." : ".$couple['wife']." is my wife.";

Checkout the solution -

$string = "$couple[husband] : $couple[wife] is my wife.";

as you can see you have to remove single quotes and backslashes if you are using the entire string inside double qoutes.

A much better approach will be -

$string = $couple[husband].' : '.$couple[wife].' is my wife.';

call_user_func_array('sprintf', array_merge(['%s : %s is my wife.'], $couple))

来源：https://stackoverflow.com/questions/27742321/how-to-echo-element-of-associative-array-in-string

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