$string = "this is a string biggest string bigger than the string1 string";
$random_position = rand(0, strlen($string) - 1);
$chars = "👴🏿👩🏿💻🧑🏿🚀🧚🏿🤦🏿♀️👬🏿🚣🏿♂️✡️♈️🈯️🆗👩🏾❤️👩🏼🧑🏼❤️🧑🏻";
$random_char = $chars[rand(0, strlen($chars) - 1)];
$newString = substr($string, 0, $random_position) . $random_char . substr($string, $random_position);
echo $newString;
this is my code and I want to add these symbols in my string at random places but I can't do it. does anyone can help me??
The problem is that your $chars string has multibyte characters, so when you address $chars[$i] for some $i, you'll just get one part of a multibyte character, not in full.
The solution is to use mb_ functions:
$chars = mb_str_split("👴🏿👩🏿💻🧑🏿🚀🧚🏿🤦🏿♀️👬🏿🚣🏿♂️✡️♈️🈯️🆗👩🏾❤️👩🏼🧑🏼❤️🧑🏻");
$random_char = $chars[rand(0, count($chars) - 1)];
With this it will work.