【www.tuzhexing.com--实用知识】
关键词高亮function highlight($sString, $aWords) {
if (!is_array ($aWords) || empty ($aWords) || !is_string ($sString)) {
return false;
}
$sWords = implode ("|", $aWords);
return preg_replace ("@\b(".$sWords.")\b@si", "<strong style="background-color:yellow">$1</strong>", $sString);
}
获取你的Feedburner的用户
function get_average_readers($feed_id,$interval = 7){
$today = date("Y-m-d", strtotime("now"));
$ago = date("Y-m-d", strtotime("-".$interval." days"));
$feed_url="https://feedburner.google.com/api/awareness/1.0/GetFeedData?uri=".$feed_id."&dates=".$ago.",".$today;
$ch = curl_init();
curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
curl_setopt($ch, CURLOPT_URL, $feed_url);
$data = curl_exec($ch);
curl_close($ch);
$xml = new SimpleXMLElement($data);
$fb = $xml->feed->entry["circulation"];
$nb = 0;
foreach($xml->feed->children() as $circ){
$nb += $circ["circulation"];
}
return round($nb/$interval);
}
自动生成密码
function generatePassword($length=9, $strength=0) {
$vowels = "aeuy";
$consonants = "bdghjmnpqrstvz";
if ($strength >= 1) {
$consonants .= "BDGHJLMNPQRSTVWXZ";
}
if ($strength >= 2) {
$vowels .= "AEUY";
}
if ($strength >= 4) {
$consonants .= "23456789";
}
if ($strength >= 8 ) {
$vowels .= "@#$%";
}
$password = "";
$alt = time() % 2;
for ($i = 0; $i < $length; $i++) {
if ($alt == 1) {
$password .= $consonants[(rand() % strlen($consonants))];
$alt = 0;
} else {
$password .= $vowels[(rand() % strlen($vowels))];
$alt = 1;
}
}
return $password;
}
压缩多个CSS文件
header("Content-type: text/css");
ob_start("compress");
function compress($buffer) {
/* remove comments */
$buffer = preg_replace("!/\*[^*]*\*+([^/][^*]*\*+)*/!", "", $buffer);
/* remove tabs, spaces, newlines, etc. */
$buffer = str_replace(array("\r\n", "\r", "\n", "\t", " ", " ", " "), "", $buffer);
return $buffer;
}
/* your css files */
include("master.css");
include("typography.css");
include("grid.css");
include("print.css");
include("handheld.css");
ob_end_flush();
获取短网址
function getTinyUrl($url) {
return file_get_contents("http://tinyurl.com/api-create.php?url=".$url);
}
根据生日计算年龄
function age($date){
$year_diff = "";
$time = strtotime($date);
if(FALSE === $time){
return "";
}
$date = date("Y-m-d", $time);
list($year,$month,$day) = explode("-",$date);
$year_diff = date("Y") – $year;
$month_diff = date("m") – $month;
$day_diff = date("d") – $day;
if ($day_diff < 0 || $month_diff < 0) $year_diff–;
return $year_diff;
}
计算执行时间
//Create a variable for start time
$time_start = microtime(true);
// Place your PHP/HTML/JavaScript/CSS/Etc. Here
//Create a variable for end time
$time_end = microtime(true);
//Subtract the two times to get seconds
$time = $time_end - $time_start;
echo "Script took ".$time." seconds to execute";
PHP的维护模式
function maintenance($mode = FALSE){
if($mode){
if(basename($_SERVER["SCRIPT_FILENAME"]) != "maintenance.php"){
header("Location: http://example.com/maintenance.php");
exit;
}
}else{
if(basename($_SERVER["SCRIPT_FILENAME"]) == "maintenance.php"){
header("Location: http://example.com/");
exit;
}
}
}
阻止CSS样式被缓存
<link href="/stylesheet.css?<?php echo time(); ?>" rel="stylesheet" type="text/css" /&glt;
为数字增加 st\nd\rd 等
function make_ranked($rank) {
$last = substr( $rank, -1 );
$seclast = substr( $rank, -2, -1 );
if( $last > 3 || $last == 0 ) $ext = "th";
else if( $last == 3 ) $ext = "rd";
else if( $last == 2 ) $ext = "nd";
else $ext = "st";
if( $last == 1 && $seclast == 1) $ext = "th";
if( $last == 2 && $seclast == 1) $ext = "th";
if( $last == 3 && $seclast == 1) $ext = "th";
return $rank.$ext;
}