Why Does `print_r()` Sometimes Output a "1"?

Unveiling the Mystery of the "1" in print_r() Output

When executing the print_r() function, which is used to print information about a variable, you might encounter an unfamiliar "1" appended at the end of the output. This can be perplexing, considering that the PHP manual falls short in providing clear guidance on interpreting such output.

To decipher the significance of this "1", it's crucial to examine the code. If you have mistakenly included echo before print_r(), like echo print_r($view), this would trigger the "1" to appear. To resolve this, simply remove the echo construct.

It's worth noting that manually parsing the output of print_r() is generally not necessary. Modern PHP offers more efficient and adaptable alternatives to meet your data manipulation needs. Consider leveraging PHP's built-in functions, such as var_dump() or json_encode(), which can provide a clearer and more informative representation of your data.

The above is the detailed content of Why Does `print_r()` Sometimes Output a "1"?. For more information, please follow other related articles on the PHP Chinese website!