php 过滤字符串函数
function addslashes_str($str){
$str=addslashes($str);
$str=str_replace($str,";",';');
return $str;
}
function stripslashes_str($str){
$str=stripslashes($str);
$str=str_replace($str,';',";");
return $str;
}
?>
chop(); //除去字符串右边空格
trim(); //除去字符串中所有空格
ltrim(); //除去字符串左边空格
htmlspecialchars(); //转换'$','"',''为相应的html实体
htmlentities(); //转换所有html标记为相应的html实体
array explode(string separator, string str); //分割字符串
string implode(string separator, array arr); //连接字符串
strtoupper(); strtolower(); //转换大小写
ucfirst(); //只转换第一个字符为大写
ucwords(); //转换每个words的第一个字母为大写
iconv()
php内码转换函数,同上
因为iconv()在转换gb2312时的bug,所以要这样处理
iconv( "utf-8", "gb2312//ignore" , $str)
mb_convert_encoding()
php的内码转换函数
版本(php 4 >= 4.0.6, php 5)
这个函数可以将各种编码互相转换
mb_convert_encoding($str,"gb2312", "utf-8");
mysql教程_real_escape_string()
定义:函数转义 sql 语句中使用的字符串中的特殊字符。
语法: mysql_real_escape_string(string,connection)
说明:本函数将 string 中的特殊字符转义,并考虑到连接的当前字符集,因此可以安全用于 mysql_query()。
?>

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PHP and Python each have their own advantages, and the choice should be based on project requirements. 1.PHP is suitable for web development, with simple syntax and high execution efficiency. 2. Python is suitable for data science and machine learning, with concise syntax and rich libraries.

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PHP is still dynamic and still occupies an important position in the field of modern programming. 1) PHP's simplicity and powerful community support make it widely used in web development; 2) Its flexibility and stability make it outstanding in handling web forms, database operations and file processing; 3) PHP is constantly evolving and optimizing, suitable for beginners and experienced developers.

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PHP is suitable for web development, especially in rapid development and processing dynamic content, but is not good at data science and enterprise-level applications. Compared with Python, PHP has more advantages in web development, but is not as good as Python in the field of data science; compared with Java, PHP performs worse in enterprise-level applications, but is more flexible in web development; compared with JavaScript, PHP is more concise in back-end development, but is not as good as JavaScript in front-end development.

PHP and Python have their own advantages and disadvantages, and the choice depends on project needs and personal preferences. 1.PHP is suitable for rapid development and maintenance of large-scale web applications. 2. Python dominates the field of data science and machine learning.
