in_array function with empty array

[qlixes]

Description

The following code:

<?php
print_r(in_array('127.0.0.1', []);

Resulted in this output:

empty blank page

But I expected this output instead:

it shoud show boolean type

PHP Version

PHP 8.3

Operating System

OSX Ventura

[DanielEScherzer]

This is unrelated to in_array, which returns false fine. What you are seeing is that print_r for false doesn't show anything

php-src/Zend/zend_operators.c

Lines 1016 to 1017 in 64d959e

	case IS_FALSE:
	return ZSTR_EMPTY_ALLOC();

[damianwadley]

Meanwhile var_dump doesn't have that... "quirk" of behavior.