Is there any error message being displayed?
The issue may be related to a syntax error in the PHP code. To solve this issue, check for any missing semicolons, parentheses, or curly braces in the code. Additionally, make sure that all variables and functions are properly defined and used.
```php
// Example PHP code snippet with a syntax error
$number = 10
echo "The number is: " . $number;
```
In the code snippet above, the missing semicolon after `$number = 10` will cause a syntax error. Adding a semicolon after `$number = 10;` will fix the issue.