What are common debugging techniques for PHP scripts with issues related to passing values?

When debugging PHP scripts with issues related to passing values, a common technique is to use var_dump() or print_r() to inspect the values being passed. This can help identify if the correct values are being passed and if they are of the expected data type. Additionally, checking for typos in variable names or ensuring that variables are properly initialized can help resolve passing value issues.

// Example code snippet demonstrating the use of var_dump() to debug passing values
$var1 = "Hello";
$var2 = "World";

var_dump($var1, $var2);