|
|
|
|
Bookmark this on Delicious
Share on Facebook
 Slashdot It!
Digg  mb_strtolower
Make a string lowercase
(PHP 4 >= 4.3.0, PHP 5)
Example 1406. mb_strtolower() example<?phpCode Examples / Notes » mb_strtolowerphilipp h
Note that mb_strtolower() is very SLOW, if you have a database connection, you may want to use it to convert your strings to lower case. Even latin1/9 (iso-8859-1/15) and other encodings are possible. Have a look at my simple benchmark: <?php $text = "Lörem ipßüm dölör ßit ämet, cönßectetüer ädipißcing elit. Sed ligülä. Präeßent jüßtö tellüß, grävidä eü, tempüß ä, mättiß nön, örci. Näm qüiß lörem. Näm äliqüet elit ßed elit. Phäßellüß venenätiß jüßtö eget enim. Dönec nißl. Pröin mättiß venenätiß jüßtö. Sed äliqüäm pörtä örci. Cräß elit nißl, cönvälliß qüiß, tincidünt ät, vehicülä äccümßän, ödiö. Sed möleßtie. Etiäm mölliß feügiät elit. Veßtibülüm änte ipßüm primiß in fäücibüß örci lüctüß et ültriceß pößüere cübiliä Cüräe; Mäecenäß nön nüllä."; // mb_strtolower() $timeMB = microtime(true); for($i=0;$i<30000;$i++) $lower = mb_strtolower("$text/no-cache-$i"); $timeMB = microtime(true) - $timeMB; // MySQL lower() $timeSQL = microtime(true); mysql_query("set names latin1"); for($i=0;$i<30000;$i++) { $r = mysql_fetch_row(mysql_query("select lower('$text/no-cache-$i')")); $lower = $r[0]; } $timeSQL = microtime(true) - $timeSQL; echo "mb: ".sprintf("%.5f",$timeMB)." sek.<br />"; echo "sql: ".sprintf("%.5f",$timeSQL)." sek.<br />"; // Result on my notebook: // mb: 11.50642 sek. // sql: 5.44143 sek. ?> btherl
If you use this function on a unicode string without telling PHP that it is unicode, then you will corrupt your string. In particular, the uppercase 'A' with tilde, common in 2-byte UTF-8 characters, is converted to lowercase 'a' with tilde. This can be handled correctly by: $str = mb_strtolower($str, mb_detect_encoding($str)); Or if you know your data is UTF-8, just use the string "UTF-8" as the second argument. You should check also that mb_detect_encoding() is checking the encodings you want it to check, and is detecting the correct encodings. |
Change Language
mb_check_encoding mb_convert_case mb_convert_encoding mb_convert_kana mb_convert_variables mb_decode_mimeheader mb_decode_numericentity mb_detect_encoding mb_detect_order mb_encode_mimeheader mb_encode_numericentity mb_ereg_match mb_ereg_replace mb_ereg_search_getpos mb_ereg_search_getregs mb_ereg_search_init mb_ereg_search_pos mb_ereg_search_regs mb_ereg_search_setpos mb_ereg_search mb_ereg mb_eregi_replace mb_eregi mb_get_info mb_http_input mb_http_output mb_internal_encoding mb_language mb_output_handler mb_parse_str mb_preferred_mime_name mb_regex_encoding mb_regex_set_options mb_send_mail mb_split mb_strcut mb_strimwidth mb_stripos mb_stristr mb_strlen mb_strpos mb_strrchr mb_strrichr mb_strripos mb_strrpos mb_strstr mb_strtolower mb_strtoupper mb_strwidth mb_substitute_character mb_substr_count mb_substr |
