<!DOCTYPE html>
<!--
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To change this template file, choose Tools | Templates
and open the template in the editor.
-->
<html>
<head>
<meta charset="UTF-8">
<title></title>
</head>
<body>
<?php
// put your code here 字符串的输出函数echo()
$str = "Hello World";
echo $str;
?>
</body>
</html>
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<!DOCTYPE html>
<!--
To change this license header, choose License Headers in Project Properties.
To change this template file, choose Tools | Templates
and open the template in the editor.
-->
<html>
<head>
<meta charset="UTF-8">
<title></title>
</head>
<body>
<?php
// put your code here程序报错后终止继续运行的函数die()
$conn = @mysql_connect("localhost", "root", "root") or die("数据库连接失败！");
?>
</body>
</html>
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<!DOCTYPE html>
<!--
To change this license header, choose License Headers in Project Properties.
To change this template file, choose Tools | Templates
and open the template in the editor.
-->
<html>
<head>
<meta charset="UTF-8">
<title></title>
</head>
<body>
<?php
// put your code here打印函数print_r()
$arr = array('0'=>'PHP',"1"=>array('0'=>'P', '1'=>'H', '2'=>'P'));
print_r($arr);
?>
</body>
</html>
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<!DOCTYPE html>
<!--
To change this license header, choose License Headers in Project Properties.
To change this template file, choose Tools | Templates
and open the template in the editor.
-->
<html>
<head>
<meta charset="UTF-8">
<title></title>
</head>
<body>
<?php
// put your code here字符串分割函数explode()
$str = "PHP,JSP,JAVA,C++,HTML";
print_r(explode(",",$str));
?>
</body>
</html>
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<!DOCTYPE html>
<!--
To change this license header, choose License Headers in Project Properties.
To change this template file, choose Tools | Templates
and open the template in the editor.
-->
<html>
<head>
<meta charset="UTF-8">
<title></title>
</head>
<body>
<?php
// put your code here数组元素组合成字符串的函数implode()
$arr = array('Hello', 'World!', 'Beautiful', 'Day!');
echo implode(" ", $arr);
?>
</body>
</html>
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<!DOCTYPE html>
<!--
To change this license header, choose License Headers in Project Properties.
To change this template file, choose Tools | Templates
and open the template in the editor.
-->
<html>
<head>
<meta charset="UTF-8">
<title></title>
</head>
<body>
<?php
// put your code here预定义字符串转换为HTML实体的函数htmlspecialchars()
$str = "<strong>PHP100.COM</strong>";
echo htmlspecialchars($str);
?>
</body>
</html>
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<!DOCTYPE html>
<!--
To change this license header, choose License Headers in Project Properties.
To change this template file, choose Tools | Templates
and open the template in the editor.
-->
<html>
<head>
<meta charset="UTF-8">
<title></title>
</head>
<body>
<?php
// put your code here
$str = "<font color='red'>PHP</font> + <em>Apache</em> + <b>Mysql</b>";
echo strip_tags($str);
echo "<br/>";
echo strip_tags($str, "<font>");
echo "<br/>";
echo strip_tags($str, "<font><em><b>");
?>
</body>
</html>
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<!DOCTYPE html>
<!--
To change this license header, choose License Headers in Project Properties.
To change this template file, choose Tools | Templates
and open the template in the editor.
-->
<html>
<head>
<meta charset="UTF-8">
<title></title>
</head>
<body>
<?php
// put your code here去除字符串首尾连续空格的函数
$str = " PHP100 ";
echo strlen($str)."<br>";
echo strlen(ltrim($str))."<br>";
echo strlen(rtrim($str))."<br>";
echo strlen(trim($str));
?>
</body>
</html>
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<!DOCTYPE html>
<!--
To change this license header, choose License Headers in Project Properties.
To change this template file, choose Tools | Templates
and open the template in the editor.
-->
<html>
<head>
<meta charset="UTF-8">
<title></title>
</head>
<body>
<?php
// put your code here
echo nl2br("PHP100.COM \n PHP100.NET");
?>
</body>
</html>
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<!DOCTYPE html>
<!--
To change this license header, choose License Headers in Project Properties.
To change this template file, choose Tools | Templates
and open the template in the editor.
-->
<html>
<head>
<meta charset="UTF-8">
<title></title>
</head>
<body>
<?php
// put your code here加密函数MD5
$str = "PHP100.COM";
echo md5($str);
?>
</body>
</html>
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<!DOCTYPE html>
<!--
To change this license header, choose License Headers in Project Properties.
To change this template file, choose Tools | Templates
and open the template in the editor.
-->
<html>
<head>
<meta charset="UTF-8">
<title></title>
</head>
<body>
<?php
// put your code here加密函数sha1()
$str = "PHP100.COM";
echo sha1($str);
?>
</body>
</html>
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以上就介紹了PHP字串處理函數範例學習筆記，包括了方面的內容，希望對PHP教程有興趣的朋友有所幫助。
