How can output buffering be used to solve the issue of displaying content before a variable is set in PHP?

Issue: When trying to display content that relies on a variable that is set later in the script, PHP will throw an undefined variable error. Output buffering can be used to capture the content that needs the variable and then display it once the variable is set. 

<?php
ob_start();

// Content that relies on a variable
echo "Hello, ";

// Set the variable later in the script
$name = "John Doe";

// Get the buffered content and display it
ob_end_flush();
echo $name;
?>

Keywords

output buffering PHP variable content display

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