一些很有用的 PHP 代码片段
1. [代码]连接 MySQL 数据库
<?php $host="localhost";
$uname="database username";
$pass="database password";
$database = "database name";
$connection=mysql_connect($host,$uname,$pass)
or die("Database Connection Failed");
$result=mysql_select_db($database)
or die("database cannot be selected");
?>
2. [代码]PHP function to display limited words from a string.
function words_limit( $str, $num, $append_str='' ){
$words = preg_split( '/[\s]+/', $str, -1, PREG_SPLIT_OFFSET_CAPTURE );
if( isset($words[$num][1]) ){
$str = substr( $str, 0, $words[$num][1] ).$append_str;
}
unset( $words, $num );
return trim( $str );>
}
echo words_limit($yourString, 50,'...');
or
echo words_limit($yourString, 50);
3. [代码]显示 Youtube 或 Vimeo 视频缩略图
function video_image($url){
$image_url = parse_url($url);
if($image_url['host'] == 'www.youtube.com' ||
$image_url['host'] == 'youtube.com'){
$array = explode("&", $image_url['query']);
return "http://img.youtube.com/vi/".substr($array[0], 2)."/0.jpg";
}else if($image_url['host'] == 'www.youtu.be' ||
$image_url['host'] == 'youtu.be'){
$array = explode("/", $image_url['path']);
return "http://img.youtube.com/vi/".$array[1]."/0.jpg";
}else if($image_url['host'] == 'www.vimeo.com' ||
$image_url['host'] == 'vimeo.com'){
$hash = unserialize(file_get_contents("http://vimeo.com/api/v2/video/".
substr($image_url['path'], 1).".php"));
return $hash[0]["thumbnail_medium"];
}
}
@@##@@" />
4. [代码]根据生日计算年龄
function age_from_dob($dob){
$dob = strtotime($dob);
$y = date('Y', $dob);
if (($m = (date('m') - date('m', $dob))) <h3>
<em>5. </em><em>[代码]</em>Cookie 操作</h3><pre class="brush: php; auto-links: false; ">//设置 Cookie
setcookie("name", 'value', time()+3600*60*30);
//显示 Cookie
if ($_COOKIE["name"]!=""){
$_SESSION['name'] = $_COOKIE["name"];
}
6. [代码]生成随机密码
//方法1
echo substr(md5(uniqid()), 0, 8);
//方法2
function rand_password($length){
$chars = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz';
$chars .= '0123456789' ;
$chars .= '!@#%^&*()_,./?;:[]{}\|=+';
$str = '';
$max = strlen($chars) - 1;
for ($i=0; $i <h3>
<em>7. </em><em>[代码]</em>计算日期差异 </h3><pre class="brush: php; auto-links: false; ">date_default_timezone_set("Asia/Calcutta");
function dt_differ($start, $end){
$start = date("G:i:s:m:d:Y", strtotime($start));
$date1=explode(":", $start);
$end = date("G:i:s:m:d:Y", strtotime($end));
$date2=explode(":", $end);
$starttime = mktime(date($date1[0]),date($date1[1]),date($date1[2]),
date($date1[3]),date($date1[4]),date($date1[5]));
$endtime = mktime(date($date2[0]),date($date2[1]),date($date2[2]),
date($date2[3]),date($date2[4]),date($date2[5]));
$seconds_dif = $starttime-$endtime;
return $seconds_dif;
}
8. [代码]转换秒到日期、时或者分
function seconds2days($mysec) {
$mysec = (int)$mysec;
if ( $mysec === 0 ) {
return '0 second';
}
$mins = 0;
$hours = 0;
$days = 0;
if ( $mysec >= 60 ) {
$mins = (int)($mysec / 60);
$mysec = $mysec % 60;
}
if ( $mins >= 60 ) {
$hours = (int)($mins / 60);
$mins = $mins % 60;
}
if ( $hours >= 24 ) {
$days = (int)($hours / 24);
$hours = $hours % 60;
}
$output = '';
if ($days){
$output .= $days." days ";
}
if ($hours) {
$output .= $hours." hours ";
}
if ( $mins ) {
$output .= $mins." minutes ";
}
if ( $mysec ) {
$output .= $mysec." seconds ";
}
$output = rtrim($output);
return $output;
}
9. [代码]文件解压
<?php $zip = zip_open("moooredale.zip");
if ($zip) {
while ($zip_entry = zip_read($zip)) {
$fp = fopen(zip_entry_name($zip_entry), "w");
if (zip_entry_open($zip, $zip_entry, "r")) {
$buf = zip_entry_read($zip_entry, zip_entry_filesize($zip_entry));
fwrite($fp,"$buf");
zip_entry_close($zip_entry);
fclose($fp);
}
}
zip_close($zip);
}
?>
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