When concatenating HTML strings in PHP, is it better to use single quotes ('') or double quotes ("") for improved performance?

When concatenating HTML strings in PHP, it is generally better to use single quotes ('') instead of double quotes ("") for improved performance. This is because PHP does not have to parse the string for variables or special characters when using single quotes, resulting in slightly faster execution. However, if you need to include variables or special characters within the HTML strings, you should use double quotes for those specific instances. 

// Using single quotes for concatenating HTML strings for improved performance
$html = '<div>';
$html .= '<p>Hello, world!</p>';
$html .= '</div>';

echo $html;

Keywords

PHP concatenation HTML strings single quotes double quotes

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