中文等多字节字符串翻转
$str = '字符串反转';
function rev($str, $encoding = 'utf-8'){
$len = mb_strlen($str, $encoding);
$result = '';
for ($i = $len-1; $i>=0; $i--){
$result.= mb_substr($str,$i,1,$encoding);
}
return $result;
}
echo rev($str);
生成圆形头像：
test('2.jpg','1.jpg'); #2原图 1生成图
function test($url,$path='./'){
$w = 100; $h=100; // original size
$original_path= $url;
$dest_path = $path.uniqid().'.png';
$src = imagecreatefromstring(file_get_contents($original_path));
$newpic = imagecreatetruecolor($w,$h);
imagealphablending($newpic,false);
$transparent = imagecolorallocatealpha($newpic, 0, 0, 0, 127);
$r=$w/2;
for($x=0;$x<$w;$x++)
for($y=0;$y<$h;$y++){
$c = imagecolorat($src,$x,$y);
$_x = $x - $w/2;
$_y = $y - $h/2;
if((($_x*$_x) + ($_y*$_y)) < ($r*$r)){
imagesetpixel($newpic,$x,$y,$c);
}else{
imagesetpixel($newpic,$x,$y,$transparent);
}
}
imagesavealpha($newpic, true);
imagepng($newpic, $dest_path);
imagedestroy($newpic);
imagedestroy($src);
// unlink($url);
return $dest_path;
}
curl随机IP访问：
function curl($url,$ifpost = 0, $datafields = '', $cookiefile = '', $v = false){
$ip_long = array(
array('607649792', '608174079'), //36.56.0.0-36.63.255.255
array('1038614528', '1039007743'), //61.232.0.0-61.237.255.255
array('1783627776', '1784676351'), //106.80.0.0-106.95.255.255
array('2035023872', '2035154943'), //121.76.0.0-121.77.255.255
array('2078801920', '2079064063'), //123.232.0.0-123.235.255.255
array('-1950089216', '-1948778497'), //139.196.0.0-139.215.255.255
array('-1425539072', '-1425014785'), //171.8.0.0-171.15.255.255
array('-1236271104', '-1235419137'), //182.80.0.0-182.92.255.255
array('-770113536', '-768606209'), //210.25.0.0-210.47.255.255
array('-569376768', '-564133889'), //222.16.0.0-222.95.255.255
);
$rand_key = mt_rand(0, 9);
$ip= long2ip(mt_rand($ip_long[$rand_key][0], $ip_long[$rand_key][1]));
$header = array("Connection: Keep-Alive","Accept: text/html, application/xhtml+xml, */*", "Pragma: no-cache", "Accept-Language: zh-Hans-CN,zh-Hans;q=0.8,en-US;q=0.5,en;q=0.3","User-Agent: Mozilla/5.0 (compatible; MSIE 10.0; Windows NT 6.2; WOW64; Trident/6.0)",'CLIENT-IP:'.$ip,'X-FORWARDED-FOR:'.$ip);
$ch = curl_init();
curl_setopt($ch, CURLOPT_URL, $url);
curl_setopt($ch, CURLOPT_HEADER, $v);
curl_setopt($ch, CURLOPT_HTTPHEADER, $header);
$ifpost && curl_setopt($ch, CURLOPT_POST, $ifpost);
$ifpost && curl_setopt($ch, CURLOPT_POSTFIELDS, $datafields);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
curl_setopt($ch, CURLOPT_FOLLOWLOCATION, true);
$cookiefile && curl_setopt($ch, CURLOPT_COOKIEFILE, $cookiefile);
$cookiefile && curl_setopt($ch, CURLOPT_COOKIEJAR, $cookiefile);
curl_setopt($ch,CURLOPT_TIMEOUT,30); //允许执行的最长秒数
$ok = curl_exec($ch);
curl_close($ch);
unset($ch);
return $ok;
}
print_r(curl("https://www.r1989.com"));