Quickly fetch attributes

# Imagick::pingImageBlob

(PECL imagick 2, PECL imagick 3)

Imagick::pingImageBlob — Quickly fetch attributes

### 说明

public function Imagick::pingImageBlob(string `$image`): bool

This method can be used to query image width, height, size, and format without reading the whole image to memory. 此方法在Imagick基于ImageMagick 6.2.9以上版本编译时可用。

### 参数

`image`

  A string containing the image.

### 返回值

成功时返回 `true`。

### 示例

示例 #1 Using Imagick::pingImageBlob()

Pinging an image from a string

    <?php
    /* read image contents */
    $image = file_get_contents("test.jpg");

    /* create new imagick object */
    $im = new Imagick();

    /* pass the string to the imagick object */
    $im->pingImageBlob($image);

    /* output image width and height */
    echo $im->getImageWidth() . 'x' . $im->getImageHeight();
    ?>

### 参见

- Imagick::pingImage() - Fetch basic attributes about the image
- Imagick::pingImageFile() - Get basic image attributes in a lightweight manner
- Imagick::readImage() - Reads image from filename
- Imagick::readImageBlob() - 从二进制字符串里读取图片
- Imagick::readImageFile() - Reads image from open filehandle

`↑` and `↓` to navigate • `Enter` to select • `Esc` to close • `/` to open