Why Doesn't My PHP Variable Render Inside a Single-Quoted Echoed String?

Inserting Variables into Echoed Strings in PHP

Echoing strings and inserting variables into them is a common practice in PHP. This article explores a scenario where a PHP variable is not rendered within an echoed string.

The code snippet provided attempts to insert the variable $i into an HTML element class attribute:

$i = 1;
echo '
<p class="paragraph$i">
</p>
';
++i;

However, this code fails to output the desired result due to the use of single quotes for the echoed string. Single quotes in PHP do not parse variables within them.

Solution:

To successfully insert a variable into an echo string, one can use double quotes or a dot to extend the echo. Here are the options:

• Double Quotes:

  $variableName = 'Ralph';
  echo "Hello $variableName!";

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• Dot Extension:

  echo 'Hello '.$variableName.'!';

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Applying these solutions to your specific case:

$i = 1;
echo '<p class="paragraph'.$i.'"></p>';
++i;

OR

$i = 1;
echo "<p class='paragraph$i'></p>";
++i;

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