Imagick::identifyImage

(PECL imagick 2, PECL imagick 3)

Imagick::identifyImage — Identifies an image and fetches attributes

说明

public Imagick::identifyImage(bool $appendRawOutput = false): array

Identifies an image and returns the attributes. Attributes include the image width, height, size, and others.

参数

appendRawOutput: If true then the raw output is appended to the array.

返回值

Identifies an image and returns the attributes. Attributes include the image width, height, size, and others.

错误／异常

错误时抛出 ImagickException。

示例 #1 Example Result Format

Array
(
    [imageName] => /some/path/image.jpg
    [format] => JPEG (Joint Photographic Experts Group JFIF format)
    [geometry] => Array
        (
            [width] => 90
            [height] => 90
        )

    [type] => TrueColor
    [colorSpace] => RGB
    [resolution] => Array
        (
            [x] => 300
            [y] => 300
        )

    [units] => PixelsPerInch
    [fileSize] => 1.88672kb
    [compression] => JPEG
    [signature] => 9a6dc8f604f97d0d691c0286176ddf992e188f0bebba98494b2146ee2d7118da
)

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User Contributed Notes 3 notes

down

rhuanpachecok at gmail dot com ¶

2 years ago


I have created a function to parse the "rawOutput" because the information provided by this function is quite useless.

function parseIdentify($info) {
    $lines = explode("\n", $info);
    
    $outputs = [];
    $output = [];
    $keys = [];
    
    $currSpaces = 0;
    $raw = false;
    
    foreach($lines as $line) {
        $trimLine = trim($line);
        
        if(empty($trimLine)) continue;
        
        if($raw) {
            preg_match('/^[0-9]+:\s/', $trimLine, $match);
            
            if(!empty($match)) {
                $regex = '/([\d]+):';
                $regex .= '\s(\([\d|\s]{1,3},[\d|\s]{1,3},[\d|\s]{1,3},[\d|\s]{1,3}\))';
                $regex .= '\s(#\w+)';
                $regex .= '\s(srgba\([\d|\s]{1,3},[\d|\s]{1,3},[\d|\s]{1,3},[\d|\s|.]+\)|\w+)/';

                preg_match($regex, $trimLine, $matches);
                array_shift($matches);
                
                $output['Image'][$raw][] = $matches;
                
                continue;
            }
            
            else {
                $raw = false;
                array_pop($keys);
            }
        }
        
        preg_match('/^\s+/', $line, $match);
        
        $spaces = isset($match[0]) ? strlen($match[0]) : $spaces = 0;
        $parts = preg_split('/:\s/', $trimLine, 2);
        
        $_key = ucwords($parts[0]);
        $_key = str_replace(' ', '', $_key);
        $_val = isset($parts[1]) ? $parts[1] : [];
        
        if($_key == 'Image') {
            if(!empty($output)) {
                $outputs[] = $output['Image'];
                $output = [];
            }
            
            $_val = [];
        }
        
        if($spaces < $currSpaces) {
            for($i = 0; $i < ($currSpaces - $spaces) / 2; $i++) {
                array_pop($keys);
            }
        }
        
        if(is_array($_val)) {
            $_key = rtrim($_key, ':');
            $keys[] = $_key;
            
            if($_key == 'Histogram' || $_key == 'Colormap') {
                $raw = $_key;
            }
        }
        
        $currSpaces = $spaces;
        $arr = &$output;
        
        foreach($keys as $key) {
            if(!isset($arr[$key])) {
                $arr[$key] = $_val;
            }
            
            $arr = &$arr[$key];
        }
        
        if(!is_array($_val)) {
            $arr[$_key] = $_val;
        }
        
    }
    
    $outputs[] = $output['Image'];
    
    return count($outputs) > 1 ? $outputs : $outputs[0];
}

Usage example:

$img = new Imagick('example.png');
$identify = parseIdentify($img->identifyImage(true)['rawOutput']);

But the "rawOutput" that this function returns only contains the first frame if it is a GIF. Alternatively you can use the command "identify" to get the data of all the frames:

$identify = parseIdentify(shell_exec('identify -verbose example.gif'));

down

php at ontheroad dot net dot nz ¶

11 years ago


If you use the option to append the raw output, you can extract the mime type from there.  I'm not sure what's going on in the background here, but it seems far less useful than the command line identify tool.

down

rob at OhReally dot nl ¶

14 years ago


The array returned by Imagick::identifyImage():

Array
(
    [imageName] => /some/path/image.jpg
    [format] => JPEG (Joint Photographic Experts Group JFIF format)
    [geometry] => Array
        (
            [width] => 90
            [height] => 90
        )

    [type] => TrueColor
    [colorSpace] => RGB
    [resolution] => Array
        (
            [x] => 300
            [y] => 300
        )

    [units] => PixelsPerInch
    [fileSize] => 1.88672kb
    [compression] => JPEG
    [signature] => 9a6dc8f604f97d0d691c0286176ddf992e188f0bebba98494b2146ee2d7118da
)

Looks like the only way to get the mimetype is getimagesize()...

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