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一些很有用的PHP代码片段

时间：2021-07-01 10:21:17 帮助过：6人阅读

<无详细内容>

$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");
?>

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);

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"];
}
}

function age_from_dob($dob){
$dob = strtotime($dob);
$y = date('Y', $dob);
if (($m = (date('m') - date('m', $dob))) < 0) {
$y++;
} elseif ($m == 0 && date('d') - date('d', $dob) < 0) {
$y++;
}
return date('Y') - $y;
}
echo age_from_dob('2005/04/19'); date in yyyy/mm/dd format.

//设置 Cookie
setcookie("name", 'value', time()+3600*60*30);
//显示 Cookie
if ($_COOKIE["name"]!=""){
$_SESSION['name'] = $_COOKIE["name"];
}

//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 < $length; $i++)
$str .= $chars[rand(0, $max)];
return $str;
}
echo rand_password(16);

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;
}

$zip = zip_open("moooredale.zip");
if ($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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