How to convert the first letter of a string to uppercase in php

Conversion method: 1. Use the ucfirst() function to convert the first letter of the entire string to uppercase letters. The syntax "ucfirst(string)" will return the converted string. 2. Use the ucwords() function to convert the first letter of each word in the string to uppercase letters. The syntax "ucwords(string)" will return the converted string.

The operating environment of this tutorial: windows7 system, PHP8.1 version, DELL G3 computer

Convert the first letter of the string to uppercase Two situations:

• Convert the first letter of the entire string to uppercase

• Convert the first letter of each word in the string to uppercase

Corresponding to different situations, different PHP functions need to be used.

1. Use the ucfirst() function to convert the first letter of the entire string to uppercase.

The ucfirst() function converts the first character of the string to uppercase.

ucfirst(string)

Parameters	Description
string	Required . Specifies the string to be converted.

• Return value: Returns the converted string.

<?php
header("Content-type:text/html;charset=utf-8");
$str = &#39;hello world!&#39;;
echo "原字符串：".$str;
echo "<br><br>首字母大写：".ucfirst($str);

?>

2. Use the ucwords() function to convert the first letter of each word in the string to uppercase

ucwords() function converts the first character of each word in the string to uppercase.

ucwords(string)

• Return value: Returns the converted string.

<?php
header("Content-type:text/html;charset=utf-8");
$str = &#39;hello world!&#39;;
echo "原字符串：".$str;
echo "<br><br>首字母大写：".ucwords($str);

?>

Recommended study: "PHP Video Tutorial"

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