超越PHP - Exceed PHP: strtolower

strtolower

(PHP 3, PHP 4 , PHP 5)

strtolower -- Make a string lowercase

Description

string strtolower ( string str)

Returns string with all alphabetic characters converted to lowercase.

Note that 'alphabetic' is determined by the current locale. This means that in i.e. the default "C" locale, characters such as umlaut-A (Ä) will not be converted.

例子 1. strtolower() example


<?php

$str = "Mary Had A Little Lamb and She LOVED It So";

$str = strtolower($str);

echo $str; // Prints mary had a little lamb and she loved it so

?>

注: 该函数适用于二进制对象！

add a note User Contributed Notes
strtolower

zaid at designerz dot com
10-Aug-2002 05:47

//compare user input with database.  Insert the call to the function inside
your sql statement
//by zaid@designerz.com
function
compare($field_name, $string)
{
  $string_lower =
strtolower($string);  //makes $string all lower case
  $string_upper =
strtoupper($string);  //makes $string all upper case
  $string_ucfirst =
ucfirst($string_lower); //capitalizes first letter
  $string_ucwords =
ucwords($string_lower); //converts a whole phrase to first upper
 
return " ($field_name Like '" . $string . "%' Or $field_name
Like '" . $string_upper . "%' Or $field_name Like '" .
$string_ucfirst . "%' Or $field_name Like '" . $string_ucwords .
"%') " ;
}

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strtok

strtoupper

Last updated: Fri, 22 Jun 2007