Some of the pictograms and Chinese characters are 4bytes of UTF-8 characters, and cannot be saved depending on the version of mysql and character code. I think there is something I want to check that there are more characters than the UTF-8 range in the string.
let’s look at sample, cherry blossom is 4 byte characters.
1 2 3 4 | mb_internal_encoding('UTF-8');$char = 'abcdefgあいうえお<img draggable="false" role="img" class="emoji" alt=";echo preg_replace('/[\xF0-\xF7][\x80-\xBF][\x80-\xBF][\x80-\xBF]/', '', $char); |
" src="abcdefgあいうえお
Wow, it’s impressive.
Ok then, I want to display an alert if 4-byte characters are included.
Let’s see regular expression below.
1 2 3 4 5 6 7 8 9 10 11 | mb_internal_encoding('UTF-8');$char = 'abcdefgあいうえお';// $char = 'abcdefgあいうえお<img draggable="false" role="img" class="emoji" alt="// echo preg_replace('/[\xF0-\xF7][\x80-\xBF][\x80-\xBF][\x80-\xBF]/', '', $char);if(preg_match('/[\xF0-\xF7][\x80-\xBF][\x80-\xBF][\x80-\xBF]/', $char)){ echo "alert, it included 4 byte";} else { echo "there is no 4 byte charcter";} |
Oh my goodness.
“just trust yourself. surely, the way to live is coming. Goethe”
