1、防止跳出web目录

首先修改httpd.conf，如果你只允许你的php脚本程序在web目录里操作，还可以修改httpd.conf文件限制php的操作路径。比如你的web目录是/usr/local/apache/htdocs，那么在httpd.conf里加上这么几行：

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本文所介绍的技术不是原创，而是从一个叫Robert Eisele的德国人那里学习来的。他写了一个PHP扩展openCV，只封装了两个函数，叫face_detect和face_count。openCV是一个开源的用C/C++开发的计算机图形图像库，非常强大，研究资料很齐全。本文重点是介绍如何使用php来调用其中的局部的功能。人脸侦查技术只是openCV一个应用分支。

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/* This object will hold the animation */
$animation = new Imagick();

/* Set the format to gif. All created images will be gifs*/
$animation->setFormat( “gif” );

/* Create a pixel to handle colors */
$color = new ImagickPixel( “white” );

/* The first frame */
$color->setColor( “white” );

/* This is the string we print on the image
Character by character */
$string = “HELLO WORLD!”;

/* Create a new ImagickDraw object and set the font
Text color defaults to black */
$draw = new ImagickDraw();

/* You can get configured fonts with $im->queryFonts
or use /path/to/file.ttf */
$draw->setFont( “Arial” );

/* Loop trough the string.. */
for ( $i = 0; $i <= strlen( $string ); $i++ )
{
/* Take some characters for this frame */
$part = substr( $string, 0, $i );

/* Create a new frame */
$animation->newImage( 100, 50, $color );

/* Annotate the characters on the image */
$animation->annotateImage( $draw, 10, 10, 0, $part );

/* Set a little higher delay for the frame*/
$animation->setImageDelay( 30 );
}

/* The last frame contains the same text with bold */
$draw->setFont( “Arial” );

/* One more frame */
$animation->newImage( 100, 50, $color );

/* Annotate the bold text on the image */
$animation->annotateImage( $draw, 10, 10, 0, $string );

/* The bold can be visible a little longer time */
$animation->setImageDelay( 60 );

/* Display the output as an animation.
Use getImagesBlob to get all images combined */
header( “Content-Type: image/gif” );
echo $animation->getImagesBlob();

?>

$new_im = new Imagick();
$new_im->setFormat(’gif’);
$pics = glob(”nv01/*.png”);
foreach($pics as $k => $v)
{
$im = new Imagick($v);
$im->trimImage(0);
$new_im->addImage($im);
$new_im->setImageDelay(15);
//设置每一帧图片是独立的，屏蔽上一帧（关键）
$new_im->setImageDispose(imagick::DISPOSE_PREVIOUS);
}
$new_im->coalesceImages();
$new_im->writeImages(’ani.gif’,1);
?>