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PHP and MySQL syntax: Difference between revisions
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→Number of characters
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<th>Example of string</th> | <th>Example of string</th> | ||
<th>Number of characters</th> | <th>Number of characters</th> | ||
<th>Number of bytes </th> | <th>Number of bytes</th> | ||
</tr> | </tr> | ||
<tr> | <tr> | ||
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* PHP: [http://php.net/mb_strlen PHP mb_strlen function] | * PHP: [http://php.net/mb_strlen PHP mb_strlen function] | ||
<pre> | <pre> | ||
// number of characters | |||
echo mb_strlen("狐", 'UTF-8') . PHP_EOL; // return 1 | echo mb_strlen("狐", 'UTF-8') . PHP_EOL; // return 1 | ||
echo mb_strlen("《王大文 Dawen》", 'UTF-8') . PHP_EOL; // return 11 | |||
// number of bytes | |||
echo strlen("狐") . PHP_EOL; // return 3 | echo strlen("狐") . PHP_EOL; // return 3 | ||
echo strlen("《王大文 Dawen》") . PHP_EOL; // return 21 | echo strlen("《王大文 Dawen》") . PHP_EOL; // return 21 | ||
</pre> | </pre> | ||
* MySQL: [http://www.w3resource.com/mysql/string-functions/mysql-char_length-function.php MySQL CHAR_LENGTH() function] | * MySQL: [http://www.w3resource.com/mysql/string-functions/mysql-char_length-function.php MySQL CHAR_LENGTH() function] | ||
<PRE> | <PRE> | ||
// number of characters | |||
SELECT CHAR_LENGTH("狐"); /* return 1 */ | SELECT CHAR_LENGTH("狐"); /* return 1 */ | ||
SELECT CHAR_LENGTH("《王大文 Dawen》"); /* return 11 */ | |||
// number of bytes | |||
SELECT LENGTH("狐"); /* return 3 */ | SELECT LENGTH("狐"); /* return 3 */ | ||
SELECT LENGTH("《王大文 Dawen》"); /* return 21 */ | SELECT LENGTH("《王大文 Dawen》"); /* return 21 */ | ||
</PRE> | </PRE> | ||
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* Excel: [https://support.office.com/en-us/article/len-lenb-functions-29236f94-cedc-429d-affd-b5e33d2c67cb LEN, LENB functions] / [https://support.office.com/zh-tw/article/LEN%E3%80%81LENB-%E5%87%BD%E6%95%B8-29236f94-cedc-429d-affd-b5e33d2c67cb LEN、LENB 函數] | * Excel: [https://support.office.com/en-us/article/len-lenb-functions-29236f94-cedc-429d-affd-b5e33d2c67cb LEN, LENB functions] / [https://support.office.com/zh-tw/article/LEN%E3%80%81LENB-%E5%87%BD%E6%95%B8-29236f94-cedc-429d-affd-b5e33d2c67cb LEN、LENB 函數] | ||
<pre> | <pre> | ||
// number of characters | |||
=LEN("狐") // return 1 | =LEN("狐") // return 1 | ||
=LEN("《王大文 Dawen》") // return 11 | =LEN("《王大文 Dawen》") // return 11 | ||
// number of bytes | |||
=LENB("狐") // return 2 | =LENB("狐") // return 2 | ||
=LENB("《王大文 Dawen》") // return 16 | =LENB("《王大文 Dawen》") // return 16 | ||