What are the potential consequences of not using "&" in query strings when developing in PHP?

When developing in PHP, not using "&" in query strings can lead to issues with URL encoding and parsing. This can result in unexpected behavior or errors when passing parameters between pages. To solve this issue, always use "&" instead of just "&" in query strings to ensure proper encoding and parsing of parameters. 

$query_string = 'param1=value1&param2=value2';
$url = 'example.com/page.php?' . $query_string;
echo '<a href="' . $url . '">Click here</a>';

Keywords

PHP query strings ampersand URL encoding security

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