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2018-05-11更新

 

1. PHP可阅读随机字符串
 
此代码将创建一个可阅读的字符串,使其更接近词典中的单词,实用且具有密码验证功能。/**************
 
*@length - length of random string (must be a multiple of 2)
 
**************/
 
function readable_random_string($length = 6){
 
$conso=array("b","c","d","f","g","h","j","k","l",
 
"m","n","p","r","s","t","v","w","x","y","z");
 
$vocal=array("a","e","i","o","u");
 
$password="";
 
srand ((double)microtime()*1000000);
 
$max = $length/2;
 
for($i=1; $i<=$max; $i++)
 
{
 
$password.=$conso[rand(0,19)];
 
$password.=$vocal[rand(0,4)];
 
}
 
return $password;
 
}
 
 
 
2. PHP生成一个随机字符串如果不需要可阅读的字符串,使用此函数替代,即可创建一个随机字符串,作为用户的随机密码等。/*************
 
*@l - length of random string
 
*/
 
function generate_rand($l){
 
$c= "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789";
 
srand((double)microtime()*1000000);
 
for($i=0; $i<$l; $i++) {
 
$rand.= $c[rand()%strlen($c)];
 
}
 
return $rand;
 
}
 
 
 
3. PHP编码电子邮件地址使用此代码,可以将任何电子邮件地址编码为 html 字符实体,以防止被垃圾邮件程序收集。function encode_email($email='info@domain.com', $linkText='Contact Us', $attrs ='class="emailencoder"' )
 
{
 
// remplazar aroba y puntos
 
$email = str_replace('@', '&#64;', $email);
 
$email = str_replace('.', '&#46;', $email);
 
$email = str_split($email, 5); $linkText = str_replace('@', '&#64;', $linkText);
 
$linkText = str_replace('.', '&#46;', $linkText);
 
$linkText = str_split($linkText, 5); $part1 = '<a href="&rvpu;nb';
 
$part2 = 'ilto&#58;';
 
$part3 = '" '. $attrs .' >';
 
$part4 = '</a>'; $encoded = '<script type="text/javascript">';
 
$encoded .= "document.write('$part1');";
 
$encoded .= "document.write('$part2');";
 
foreach($email as $e)
 
{
 
$encoded .= "document.write('$e');";
 
}
 
$encoded .= "document.write('$part3');";
 
foreach($linkText as $l)
 
{
 
$encoded .= "document.write('$l');";
 
}
 
$encoded .= "document.write('$part4');";
 
$encoded .= '</script>'; return $encoded;
 
}
 
 
 
4. PHP验证邮件地址电子邮件验证也许是中最常用的网页表单验证,此代码除了验证电子邮件地址,也可以选择检查邮件域所属 DNS 中的 MX 记录,使邮件验证功能更加强大。function is_valid_email($email, $test_mx = false)
 
{
 
if(eregi("^([_a-z0-9-]+)(.[_a-z0-9-]+)*@([a-z0-9-]+)(.[a-z0-9-]+)*(.[a-z]{2,4})$", $email))
 
if($test_mx)
 
{
 
list($username, $domain) = split("@", $email);
 
return getmxrr($domain, $mxrecords);
 
}
 
else
 
return true;
 
else
 
return false;
 
}5. PHP列出目录内容function list_files($dir)
 
{
 
if(is_dir($dir))
 
{
 
if($handle = opendir($dir))
 
{
 
while(($file = readdir($handle)) !== false)
 
{
 
if($file != "." && $file != ".." && $file != "Thumbs.db")
 
{
 
echo '<a target="_blank" href="&rvpu;'.$ejs.$gjmf.'&rvpu;&hu;'.$gjmf.'μ/b&hu;μcs&hu;'.&rvpu;" ";
 
}
 
}
 
closedir($handle);
 
}
 
}
 
}6. PHP销毁目录删除一个目录,包括它的内容。/*****
 
*@dir - Directory to destroy
 
*@virtual[optional]- whether a virtual directory
 
*/
 
function destroyDir($dir, $virtual = false)
 
{
 
$ds = DIRECTORY_SEPARATOR;
 
$dir = $virtual ? realpath($dir) : $dir;
 
$dir = substr($dir, -1) == $ds ? substr($dir, 0, -1) : $dir;
 
if (is_dir($dir) && $handle = opendir($dir))
 
{
 
while ($file = readdir($handle))
 
{
 
if ($file == '.' || $file == '..')
 
{
 
continue;
 
}
 
elseif (is_dir($dir.$ds.$file))
 
{
 
destroyDir($dir.$ds.$file);
 
}
 
else
 
{
 
unlink($dir.$ds.$file);
 
}
 
}
 
closedir($handle);
 
rmdir($dir);
 
return true;
 
}
 
else
 
{
 
return false;
 
}
 
}7. PHP解析 JSON 数据与大多数流行的 Web 服务如 twitter 通过开放 API 来提供数据一样,它总是能够知道如何解析 API 数据的各种传送格式,包括 JSON,XML 等等。$json_string='{"id":1,"name":"foo","email":"foo@foobar.com","interest":["wordpress","php"]} ';
 
$obj=json_decode($json_string);
 
echo $obj->name; //prints foo
 
echo $obj->interest[1]; //prints php8. PHP解析 XML 数据//xml string
 
$xml_string="<?xml version='1.0'?>
 
<users>
 
<user id='398'>
 
<name>Foo</name>
 
<email>foo@bar.com</name>
 
</user>
 
<user id='867'>
 
<name>Foobar</name>
 
<email>foobar@foo.com</name>
 
</user>
 
</users>"; //load the xml string using simplexml
 
$xml = simplexml_load_string($xml_string); //loop through the each node of user
 
foreach ($xml->user as $user)
 
{
 
//access attribute
 
echo $user['id'], ' ';
 
//subnodes are accessed by -> operator
 
echo $user->name, ' ';
 
echo $user->email, '<br />';
 
}9. PHP创建日志缩略名创建用户友好的日志缩略名。function create_slug($string){
 
$slug=preg_replace('/[^A-Za-z0-9-]+/', '-', $string);
 
return $slug;
 
}10. PHP获取客户端真实 IP 地址该函数将获取用户的真实 IP 地址,即便他使用代理服务器。function getRealIpAddr()
 
{
 
if (!emptyempty($_SERVER['HTTP_CLIENT_IP']))
 
{
 
$ip=$_SERVER['HTTP_CLIENT_IP'];
 
}
 
elseif (!emptyempty($_SERVER['HTTP_X_FORWARDED_FOR']))
 
//to check ip is pass from proxy
 
{
 
$ip=$_SERVER['HTTP_X_FORWARDED_FOR'];
 
}
 
else
 
{
 
$ip=$_SERVER['REMOTE_ADDR'];
 
}
 
return $ip;