


php function code for adding watermark function and thumbnail to pictures
/**
* Add watermark to the image
* @param string $desImg The target image parameter format is ./images/pic.jpg
* @param string $waterImg The watermark image parameter format is the same as above, and the watermark image is in png format. Background transparent
* @param int positon Watermark position 1: Top left 2: Top right 3: Center 4: Bottom left 5: Bottom right
* @param bool $saveas Whether to save as, default value false, Indicates overwriting the original image
* @param int $alpha The opacity of the watermark image
* @return string $savepath The path of the new image
* **/
function watermark($desImg,$waterImg,$positon=1,$saveas=false,$alpha =30)
{
//Get the basic information of the target image
$temp=pathinfo($desImg);
$name=$temp["basename"];//File name
$path=$temp["dirname"];//The folder where the file is located
$extension=$temp["extension"];//File extension
if($saveas)
{
//Need to save as
$name=rtrim($name,".$extension")."_2.";//Rename
$savepath=$path."/".$name .$extension;
}
else
{
//Overwrite the original image if there is no need to save as
$savepath=$path."/".$name;
}
$info=getImageInfo($desImg);//Get the information of the target image
$info2=getImageInfo($waterImg);//Get the information of the watermark image
$desImg=create($desImg );//Create from the original image
$waterImg=create($waterImg);//Create from the watermark image
//Position 1: top left
if($positon==1)
{
$x=0;
$y=0;
}
//Position 2: Top right
if($positon==2)
{
$x=$info[0]-$info2[0];
$y=0;
}
//Position 3: Centered
if($positon==3)
{
$x=($info[0]-$info2[0])/2;
$y=($info[1]-$info2[1])/2;
}
//Position 4: bottom left
if($positon==4)
{
$x=0;
$y=$info[1]-$info2[1];
}
//Position 5: bottom right
if($positon==5)
{
$x=$info[0]-$info2[0];
$y=$info[1]-$info2[1];
}
imagecopymerge($desImg,$waterImg,$x,$y,0,0,$info2[0],$info2[ 1],$alpha);
imagejpeg($desImg,$savepath);
imagedestroy($desImg);
imagedestroy($waterImg);
return $savepath;
}
/**
* Get image information, width, height, image/type
* @param string $src image path
* @return array
* **/
function getImageInfo($src)
{
return getimagesize($src);
}
/**
* Create an image and return the resource type
* @param string $src Image path
* @return resource $im Return the resource type
* **/
function create($src)
{
$info=getImageInfo($src);
switch ($info[2])
{
case 1:
$im=imagecreatefromgif ($src);
break;
case 2:
$im=imagecreatefromjpeg($src);
break;
case 3:
$im=imagecreatefrompng($src) ;
break;
}
return $im;
}
/**
* Thumbnail main function
* @param string $src image path
* @param int $w thumbnail width
* @param int $h thumbnail height
* @return mixed Return thumbnail path
* **/
function resize($src,$w,$h)
{
$temp=pathinfo($src);
$name=$temp["basename"];//File name
$dir=$temp["dirname"];// The folder where the file is located
$extension=$temp["extension"];//File extension
$savepath="{$dir}/{$name}.thumb.jpg";//Thumbnail Save path, the new file name is *.thumb.jpg
//Get the basic information of the image
$info=getImageInfo($src);
$width=$info[0]; //Get the image width
$height=$info[1];//Get the image height
$per1=round($width/$height,2);//Calculate the original image aspect ratio
$per2=round($w/$h,2);//Calculate the thumbnail aspect ratio
//Calculate the scaling ratio
if($per1>$per2||$per1==$ per2)
{
//The aspect ratio of the original image is greater than or equal to the aspect ratio of the thumbnail, then the width will be given priority
$per=$w/$width;
}
if( $per1{
//The aspect ratio of the original image is smaller than the aspect ratio of the thumbnail, then the height priority is given
$per=$h/$height;
}
$temp_w=intval($width*$per);//Calculate the width of the original image after scaling
$temp_h=intval($height*$per);//Calculate the height of the original image after scaling
$temp_img =imagecreatetruecolor($temp_w,$temp_h);//Create canvas
$im=create($src);
imagecopyresampled($temp_img,$im,0,0,0,0,$temp_w,$temp_h ,$width,$height);
if($per1>$per2)
{
imagejpeg($temp_img,$savepath);
return addBg($savepath,$w,$h, "w");
//Width priority, add the background if the height is insufficient after scaling
}
if($per1==$per2)
{
imagejpeg($ temp_img,$savepath);
return $savepath;
//proportional scaling
}
if($per1{
imagejpeg($temp_img,$savepath );
return addBg($savepath,$w,$h,"h");
//Height priority, if the width is insufficient after scaling, add the background
}
}
/**
* Add background
* @param string $src image path
* @param int $w background image width
* @param int $h background image height
* @param String $first Determines the final position of the image, w width takes precedence h height takes precedence wh: proportional
* @return returns the image with background
* **/
function addBg($src,$w,$h,$fisrt="w")
{
$bg=imagecreatetruecolor($w,$h);
$white = imagecolorallocate($bg,255,255,255);
imagefill($bg,0,0,$white);//Fill the background
//Get the target image information
$info =getImageInfo($src);
$width=$info[0];//Target image width
$height=$info[1];//Target image height
$img=create($ src);
if($fisrt=="wh")
{
//Constant scaling
return $src;
}
else
{
if($fisrt=="w")
{
$x=0;
$y=($h-$height)/2;//Vertically centered
}
if ($fisrt=="h")
{
$x=($w-$width)/2;//Horizontal centering
$y=0;
}
imagecopymerge( $bg,$img,$x,$y,0,0,$width,$height,100);
imagejpeg($bg,$src);
imagedestroy($bg);
imagedestroy ($img);
return $src;
}
}

php把负数转为正整数的方法:1、使用abs()函数将负数转为正数,使用intval()函数对正数取整,转为正整数,语法“intval(abs($number))”;2、利用“~”位运算符将负数取反加一,语法“~$number + 1”。

实现方法:1、使用“sleep(延迟秒数)”语句,可延迟执行函数若干秒;2、使用“time_nanosleep(延迟秒数,延迟纳秒数)”语句,可延迟执行函数若干秒和纳秒;3、使用“time_sleep_until(time()+7)”语句。

php除以100保留两位小数的方法:1、利用“/”运算符进行除法运算,语法“数值 / 100”;2、使用“number_format(除法结果, 2)”或“sprintf("%.2f",除法结果)”语句进行四舍五入的处理值,并保留两位小数。

判断方法:1、使用“strtotime("年-月-日")”语句将给定的年月日转换为时间戳格式;2、用“date("z",时间戳)+1”语句计算指定时间戳是一年的第几天。date()返回的天数是从0开始计算的,因此真实天数需要在此基础上加1。

php判断有没有小数点的方法:1、使用“strpos(数字字符串,'.')”语法,如果返回小数点在字符串中第一次出现的位置,则有小数点;2、使用“strrpos(数字字符串,'.')”语句,如果返回小数点在字符串中最后一次出现的位置,则有。

方法:1、用“str_replace(" ","其他字符",$str)”语句,可将nbsp符替换为其他字符;2、用“preg_replace("/(\s|\ \;||\xc2\xa0)/","其他字符",$str)”语句。

php字符串有下标。在PHP中,下标不仅可以应用于数组和对象,还可应用于字符串,利用字符串的下标和中括号“[]”可以访问指定索引位置的字符,并对该字符进行读写,语法“字符串名[下标值]”;字符串的下标值(索引值)只能是整数类型,起始值为0。

在PHP中,可以利用implode()函数的第一个参数来设置没有分隔符,该函数的第一个参数用于规定数组元素之间放置的内容,默认是空字符串,也可将第一个参数设置为空,语法为“implode(数组)”或者“implode("",数组)”。


Hot AI Tools

Undresser.AI Undress
AI-powered app for creating realistic nude photos

AI Clothes Remover
Online AI tool for removing clothes from photos.

Undress AI Tool
Undress images for free

Clothoff.io
AI clothes remover

AI Hentai Generator
Generate AI Hentai for free.

Hot Article

Hot Tools

PhpStorm Mac version
The latest (2018.2.1) professional PHP integrated development tool

Dreamweaver Mac version
Visual web development tools

SecLists
SecLists is the ultimate security tester's companion. It is a collection of various types of lists that are frequently used during security assessments, all in one place. SecLists helps make security testing more efficient and productive by conveniently providing all the lists a security tester might need. List types include usernames, passwords, URLs, fuzzing payloads, sensitive data patterns, web shells, and more. The tester can simply pull this repository onto a new test machine and he will have access to every type of list he needs.

DVWA
Damn Vulnerable Web App (DVWA) is a PHP/MySQL web application that is very vulnerable. Its main goals are to be an aid for security professionals to test their skills and tools in a legal environment, to help web developers better understand the process of securing web applications, and to help teachers/students teach/learn in a classroom environment Web application security. The goal of DVWA is to practice some of the most common web vulnerabilities through a simple and straightforward interface, with varying degrees of difficulty. Please note that this software

MinGW - Minimalist GNU for Windows
This project is in the process of being migrated to osdn.net/projects/mingw, you can continue to follow us there. MinGW: A native Windows port of the GNU Compiler Collection (GCC), freely distributable import libraries and header files for building native Windows applications; includes extensions to the MSVC runtime to support C99 functionality. All MinGW software can run on 64-bit Windows platforms.
