php中英文字符转换大小写代码

正文概述

在php中会为我们提供一些常用的字符操作函数,下面我来整理了php中字符大小写转换的函数,这里我会一个个介绍,希望例子能给各位同学带来帮助.

每个单词的首字母转换为大写:ucwords()

第一个单词首字母变大写:ucfirst()

第一个单词首字母变小写:lcfirst()

所有字母变大写:strtoupper()

PHP实例代码如下:

<?php
echo strtoupper("Hello WORLD!");
?>
//输出:HELLO WORLD!

第一个单词首字母变大写:ucfirst(),代码如下:

<?php
$foo = 'where are doing?!';
$foo = ucfirst($foo); // where are doing?!
$bar = 'where are doing?!';
$bar = ucfirst($bar); // where are doing?!
$bar = ucfirst(strtolower($bar)); // where are doing?!
?>

所有字母变小写:strtolower(),代码如下:

<?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
?>

每个单词的首字母转换为大写:ucwords(),代码如下:

<?php
$foo = 'where are doing?!';
$foo = ucwords($foo); // Where are doing?!
$bar = 'where are doing?!';
$bar = ucwords($bar); // Where are doing?!
$bar = ucwords(strtolower($bar)); // Where are doing?!
?>

第一个单词首字母变小写:lcfirst(),代码如下:

<?php
$foo = 'HelloWorld';
$foo = lcfirst($foo); // where are doing
$bar = 'where are doing?!';
$bar = lcfirst($bar); // where are doing?!
$bar = lcfirst(strtoupper($bar)); // where are doing?!
?>

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波比源码 » php中英文字符转换大小写代码

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