PHP quotes inside quotes

问题

Is it possible to put quotes inside quotes?

If so how?

Here is my code:

<?php

    echo '<span onclick="$(this).addClass('selected');"> </span>';

?>

回答1:

According to php.net

To specify a literal single quote, escape it with a backslash (\). 

It means you could have:

<?php
  echo '<span onclick="$(this).addClass(\'selected\');"> </span>';
?>

回答2:

You could do this:

<?php
  // some code
?>

    <span onclick="$(this).addClass('selected');"> </span>

<?php
  // some more code.

?>

回答3:

Heredoc is the perfect solution for this:

<?php
echo <<< HereDocString
    <span onclick="$(this).addClass('selected');"> </span>
HereDocString;
?>

来源：https://stackoverflow.com/questions/21107329/php-quotes-inside-quotes