How to Properly Insert PHP Variables into Strings?

Inserting PHP Variables into Strings

Printing strings with PHP variables can be a common task, but it can lead to confusion if the syntax is not understood. For instance, consider the following code:

<div class="vote_pct" style="width: $widthpx;">

The goal is to insert the value of the PHP variable $width into the width style property. However, if spaces are included around the $width variable, it will not work. Additionally, combining the variable and "px" into one variable name will also result in errors.

The correct syntax for this task is either of the following:

$bla = '<div class="vote_pct" style="width: '.$width.'px;">';

$bla = "<div class=\"vote_pct\" style=\"width: ${width}px;\">";

In the first example, the variable is concatenated onto the string using single quotes ', while in the second example, the variable is enclosed in curly braces {} and is interpreted within double quotes ". Both of these approaches will correctly insert the value of $width into the string.

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