Some very useful snippets of PHP code

<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 is selected"); ?> Copy Code 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); Copy Code 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 $hash [0]["Thumbnail_medium"]; } } "/> Copy Code function Age_from_dob ($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. Copy Code Set cookies Setcookie ("name", ' Value ', Time () +3600*60*30); Show cookies if ($_cookie["name"]!= "") { $_session[' name '] = $_cookie["name"]; } Copy Code Method 1 Echo substr (MD5 (UNIQID ()), 0, 8); Method 2 function Rand_password ($length) { $chars = ' abcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyz '; $chars. = ' 0123456789 '; $chars. = '!@#%^&* () _,./<>?;:[]{}\|=+ '; $str = "; $max = strlen ($chars)-1; for ($i =0; $i < $length; $i + +) $str. = $chars [rand (0, $max)]; return $str; } Echo Rand_password (16); Copy Code Date_default_timezone_set ("Asia/calcutta"); function Dt_differ ($start, $end) { $start = Date ("G:i:s:m:d:y", Strtotime ($start)); $date 1=explode (":", $start); $end = Date ("G:i:s:m:d:y", Strtotime ($end)); $date 2=explode (":", $end); $starttime = mktime (Date ($date 1[0]), date ($date 1[1]), date ($date 1[2]), Date ($date 1[3]), date ($date 1[4]), date ($date 1[5]); $endtime = mktime (Date ($date 2[0]), date ($date 2[1]), date ($date 2[2]), Date ($date 2[3]), date ($date 2[4]), date ($date 2[5]); $seconds _dif = $starttime-$endtime; return $seconds _dif; } Copy Code function Seconds2days ($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; } Copy Code $zip = Zip_open ("Moooredale.zip"); if ($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); } ?> Copy Code

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