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What are common issues with PHP code that can cause the preview not to display correctly on a website?

One common issue with PHP code that can cause the preview not to display correctly on a website is syntax errors. These errors can prevent the PHP code from executing properly, leading to a blank or broken preview. To solve this issue, carefully review the PHP code for any syntax errors, such as missing semicolons or mismatched parentheses.

php 
<?php

// Incorrect code with syntax error
$variable = 5
echo "The value is: " . $variable;

// Corrected code without syntax error
$variable = 5;
echo "The value is: " . $variable;

?>

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