strlen and non latin characters in for loop
Question
I have an HTML form that sends 索索索 using post to my PHP file.
I tried strlen on it, but it gives me 24 instead of 3 (?!)...and this then breaks my for loop:
$in=$_POST['inn'];
$length=strlen($in)
for ($i=0; $i<$length; $i++) {
$cleanchar=$in[$i];
}
I want cleanchar as an individual character, like if only one character had been sent down with the POST.
How can I separate each character using PHP?
2 answers
solution1
2 ACCPTED 2012-01-22 19:47:27
Try using mb_strlen for multi-byte characters operations:
echo mb_strlen('索索索', 'utf-8'); // or omit second parameter or change to your encoding
From documentation:
Returns the number of characters in string str having character encoding encoding. A multi-byte character is counted as 1.
solution2
0 2012-01-22 19:47:10
Your form is not sending three characters, it is sending three sequences of 〹 (where 12345 is the character code for those symbols - I don't know what it actually is).
That's eight characters, times three symbols, makes a string length of 24.
If you were to run echo htmlspecialchars($_POST['inn']); you would see this effect in clear light.
I'm pretty sure there's a way to fix this... I think you need to make sure the document character set is UTF-8: <meta http-equiv="Content-Type" content="text/html; charset=utf-8" /> in your <head> section.
Even then, you will get a length of 6 or maybe 9 depending on the byte length of those symbols, since that's what strlen measures.
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