How can debugging techniques, such as using print_r() and echo statements, help in identifying issues with PHP code?

Debugging techniques like using print_r() and echo statements can help in identifying issues with PHP code by allowing developers to see the current state of variables, arrays, and objects at specific points in the code execution. This can help pinpoint where errors are occurring or where unexpected behavior is happening. By strategically placing print_r() and echo statements throughout the code, developers can track the flow of data and values, making it easier to identify and fix bugs. 

// Example code snippet using print_r() and echo statements for debugging
$variable1 = "Hello";
$variable2 = "World";

// Using print_r() to display the values of variables
print_r($variable1);
echo "<br>";
print_r($variable2);
echo "<br>";

// Adding echo statements to track the flow of data
echo "Before concatenation: " . $variable1 . " " . $variable2;
echo "<br>";

// Concatenating variables
$concatenatedString = $variable1 . " " . $variable2;

// Displaying the concatenated string
echo "After concatenation: " . $concatenatedString;

Keywords

print_r echo debugging techniques PHP code identifying issues

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