exif_read_data 


php apg

READS the EXIF headers of an image file, this means reading the metadata generated by digital cameras.




This function returns an associative ARRAY where the ARRAY indexes are the header names and the ARRAY values are the values associated with those headers.

This function will return FALSE if no data can be returned.

This functions also validates EXIF data tags according to the EXIF specification.


<?php

array|false exif_read_data( resource|string $file,
                                                        ?string $required_sections = null,
                                                           bool $as_arrays = false,
                                                           bool $read_thumbnail = false
)


where,

$file = The location of the image file

$required_sections = A comma separated list of sections
                                 ( SEE the below TABLE )
                 
$as_arrays = To control if each section 
                     becomes an ARRAY or STRINGS

$read_thumbnail = To control whether thumbnails 
                              are displayed or not

?>

  $file   


The location of the image file.

This can either be a path to the file (stream wrappers are also supported as usual) or a stream resource.



STREAM WRAPPERS MEANING
file:// LOCAL File System
http:// URL HTTP
ftp:// URL FTP
php:// I/O streams
zlib:// Data Compression stream
data:// DATA (RFC-2397)
glob:// Find Filenames
phar:// PHP Archive
ssh2:// Secure Shell 2
rar:// RAR
ogg:// Audio
expect:// Interaction of stream processes
ed48

  $required_sections   


A comma separated list of sections that need to be present in file to produce a result array.

If none of the requested sections could be found the return value is FALSE.



SECTION MEANING DEFAULT
FILE FileName, FileSize, FileDateTime, SectionsFound NULL
COMPUTED html, Width, Height, IsColor, and more if available. Height and Width are computed the same way getimagesize()
does so their values must not be part of any header returned.
Also, html is a height/width text string to be used inside normal HTML.
ANY_TAG Any tagged information.
IFD0 Specifically IFD0 data.
In normal image files, primary information.
THUMBNAIL Any image file that has a built-in thumbnail has
an additional IFD for its storage.
COMMENT Comment headers of JPEG images.
EXIFA subsection of IFD0.
Contains most of the information about the object image.
Most of this information is provided by the digital camera used.
ed48

  $as_arrays   


Specifies whether or not each section becomes an ARRAY.

The $required_sections COMPUTED, THUMBNAIL, and COMMENT always become ARRAYS as they may contain values whose names conflict with other sections.



VALUE MEANING DEFAULT
1 ( TRUE ) Each section will be treated as ARRAY
Except COMPUTED, THUMBNAIL, and COMMENT.		 0 ( FALSE )
0 ( FALSE ) Each section will be treated as STRING.
ed48

  $read_thumbnail   


To control whether thumbnails are displayed or not.



VALUE MEANING DEFAULT
1 ( TRUE ) The thumbnail will be displayed. 0 ( FALSE )
0 ( FALSE ) The thumbnail will not be displayed
ed48

  1 EXERCISE   

<?php

$img_file01 = "E 01.jpg";

echo $img_file01 . '<br><br>';
echo '<img src="img/' . $img_file01 . '" alt="' . 
$img_file01 . '" title="' . $img_file01 . '" width="70%">
<br><br>';


$exif_data01 = exif_read_data ('img/' . $img_file01);

echo '<pre>';
print_r ($exif_data01);
echo '</pre>';

$exif_data01a = exif_read_data ('img/' . $img_file01);

echo '<pre>';
print_r ($exif_data01a['COMPUTED']);
echo '</pre>';

?> 

 RESULT   

E 01.jpg

E 01.jpg apr

Array
(
[FileName] => E 01.jpg
[FileDateTime] => 1549994066
[FileSize] => 2629746
[FileType] => 2
[MimeType] => image/jpeg [SectionsFound] => ANY_TAG, IFD0, THUMBNAIL, EXIF, GPS
[COMPUTED] => Array
(
[html] => width="4032" height="3024" [Height] => 3024 [Width] => 4032 [IsColor] => 1 [ByteOrderMotorola] => 1 [ApertureFNumber] => f/2.2 [Thumbnail.FileType] => 2 [Thumbnail.MimeType] => image/jpeg )

[Make] => Apple
[Model] => iPhone SE
[Orientation] => 1
[XResolution] => 72/1
[YResolution] => 72/1
[ResolutionUnit] => 2
[Software] => 12.1.4
[DateTime] => 2019:02:12 14:54:26
[YCbCrPositioning] => 1
[Exif_IFD_Pointer] => 206
[GPS_IFD_Pointer] => 1700
[THUMBNAIL] => Array
(
[Compression] => 6
[XResolution] => 72/1
[YResolution] => 72/1
[ResolutionUnit] => 2
[JPEGInterchangeFormat] => 2104
[JPEGInterchangeFormatLength] => 15062
)

[ExposureTime] => 1/120
[FNumber] => 11/5
[ExposureProgram] => 2
[ISOSpeedRatings] => 25
[ExifVersion] => 0221
[DateTimeOriginal] => 2019:02:12 14:54:26
[DateTimeDigitized] => 2019:02:12 14:54:26
[ComponentsConfiguration] => 
[ShutterSpeedValue] => 222125/32154
[ApertureValue] => 193685/85136
[BrightnessValue] => 478176/78371
[ExposureBiasValue] => 0/1
[MeteringMode] => 5
[Flash] => 16
[FocalLength] => 83/20
[SubjectLocation] => Array
(
[0] => 2014
[1] => 1510
[2] => 2214
[3] => 1331
)

[MakerNote] => Apple iOS
[SubSecTimeOriginal] => 563
[SubSecTimeDigitized] => 563
[FlashPixVersion] => 0100
[ColorSpace] => 1
[ExifImageWidth] => 4032
[ExifImageLength] => 3024
[SensingMethod] => 2
[SceneType] => 
[ExposureMode] => 0
[WhiteBalance] => 0
[DigitalZoomRatio] => 72/43
[FocalLengthIn35mmFilm] => 49
[SceneCaptureType] => 0
[UndefinedTag:0xA432] => Array
(
[0] => 83/20
[1] => 83/20
[2] => 11/5
[3] => 11/5
)

[UndefinedTag:0xA433] => Apple
[UndefinedTag:0xA434] => iPhone SE back camera 4.15mm f/2.2
[GPSLatitudeRef] => S
[GPSLatitude] => Array
(
[0] => 8/1
[1] => 27/1
[2] => 3100/100
)

[GPSLongitudeRef] => W
[GPSLongitude] => Array
(
[0] => 34/1
[1] => 59/1
[2] => 1452/100
)

[GPSAltitudeRef] =>
[GPSAltitude] => 114067/11777
[GPSTimeStamp] => Array
(
[0] => 17/1
[1] => 54/1
[2] => 2600/100
)

[GPSSpeedRef] => K
[GPSSpeed] => 0/1
[GPSImgDirectionRef] => M
[GPSImgDirection] => 223027/1252
[GPSDestBearingRef] => M
[GPSDestBearing] => 223027/1252
[GPSDateStamp] => 2019:02:12
[UndefinedTag:0x001F] => 5/1
)


Array
(
[html] => width="4032" height="3024"
[Height] => 3024
[Width] => 4032
[IsColor] => 1
[ByteOrderMotorola] => 1
[ApertureFNumber] => f/2.2
[Thumbnail.FileType] => 2
[Thumbnail.MimeType] => image/jpeg
)


  2 EXERCISE   

<?php

$img_file02 = "img/E 02.jpg";
$exif_data02 = exif_read_data($img_file02);
echo basename($img_file02) . "<br><br>";
echo '<img src="' . $img_file02 . '" alt="' . 
$img_file02 . '" title="' . $img_file02 . 
'" width="70%"><br><br>';

$it = 
new RecursiveIteratorIterator
(new RecursiveArrayIterator($exif_data02));
echo '<pre>';
foreach($it as $key => $value) {
  echo "$key: $value <br>";   
}
echo '</pre>';

?> 

 RESULT   

E 02.jpg

E 02.jpg apr

FileName: E 02.jpg 
FileDateTime: 1549994066 
FileSize: 2629746 
FileType: 2 
MimeType: image/jpeg 
SectionsFound: ANY_TAG, IFD0, THUMBNAIL, EXIF, GPS 
html: width="4032" height="3024" 
Height: 3024 
Width: 4032 
IsColor: 1 
ByteOrderMotorola: 1 
ApertureFNumber: f/2.2 
Thumbnail.FileType: 2 
Thumbnail.MimeType: image/jpeg 
Make: Apple 
Model: iPhone SE 
Orientation: 1 
XResolution: 72/1 
YResolution: 72/1 
ResolutionUnit: 2 
Software: 12.1.4 
DateTime: 2019:02:12 14:54:26 
YCbCrPositioning: 1 
Exif_IFD_Pointer: 206 
GPS_IFD_Pointer: 1700 
Compression: 6 
XResolution: 72/1 
YResolution: 72/1 
ResolutionUnit: 2 
JPEGInterchangeFormat: 2104 
JPEGInterchangeFormatLength: 15062 
ExposureTime: 1/120 
FNumber: 11/5 
ExposureProgram: 2 
ISOSpeedRatings: 25 
ExifVersion: 0221 
DateTimeOriginal: 2019:02:12 14:54:26 
DateTimeDigitized: 2019:02:12 14:54:26 
ComponentsConfiguration:  
ShutterSpeedValue: 222125/32154 
ApertureValue: 193685/85136 
BrightnessValue: 478176/78371 
ExposureBiasValue: 0/1 
MeteringMode: 5 
Flash: 16 
FocalLength: 83/20 
0: 2014 
1: 1510 
2: 2214 
3: 1331 
MakerNote: Apple iOS 
SubSecTimeOriginal: 563 
SubSecTimeDigitized: 563 
FlashPixVersion: 0100 
ColorSpace: 1 
ExifImageWidth: 4032 
ExifImageLength: 3024 
SensingMethod: 2 
SceneType:  
ExposureMode: 0 
WhiteBalance: 0 
DigitalZoomRatio: 72/43 
FocalLengthIn35mmFilm: 49 
SceneCaptureType: 0 
0: 83/20 
1: 83/20 
2: 11/5 
3: 11/5 
UndefinedTag:0xA433: Apple 
UndefinedTag:0xA434: iPhone SE back camera 4.15mm f/2.2 
GPSLatitudeRef: S 
0: 8/1 
1: 27/1 
2: 3100/100 
GPSLongitudeRef: W 
0: 34/1 
1: 59/1 
2: 1452/100 
GPSAltitudeRef:  
GPSAltitude: 114067/11777 
0: 17/1 
1: 54/1 
2: 2600/100 
GPSSpeedRef: K 
GPSSpeed: 0/1 
GPSImgDirectionRef: M 
GPSImgDirection: 223027/1252 
GPSDestBearingRef: M 
GPSDestBearing: 223027/1252 
GPSDateStamp: 2019:02:12 
UndefinedTag:0x001F: 5/1

  3 EXERCISE   

<?php

$img_file = "img/E 03.THM";
$exif_data = exif_read_data($img_file);
echo $img_file . "<br><br>";
echo '<img src="' . $img_file . '" alt="' . 
$img_file . ' apr' . '" title="' . $img_file . '" width="160"><br><br>';

$it = 
new RecursiveIteratorIterator
(new RecursiveArrayIterator($exif_data));
echo '<pre>';
foreach($it as $key => $value) {
  echo "$key: $value <br>";   
}
echo '</pre>';

?>

 RESULT   

E 03.THM

E 03.THM apr

FileName: E 03.THM 
FileDateTime: 1568118868 
FileSize: 7828 
FileType: 2 
MimeType: image/jpeg 
SectionsFound: ANY_TAG, IFD0, EXIF, INTEROP 
html: width="160" height="120" 
Height: 120 
Width: 160 
IsColor: 1 
ByteOrderMotorola: 0 
Make: SONY 
Model: DSC-T50 
Orientation: 1 
XResolution: 72/1 
YResolution: 72/1 
ResolutionUnit: 2 
DateTime: 2009:11:30 15:18:25 
YCbCrPositioning: 2 
Exif_IFD_Pointer: 172 
ExifVersion: 0221 
DateTimeOriginal: 2009:11:30 15:18:25 
DateTimeDigitized: 2009:11:30 15:18:25 
ComponentsConfiguration:  
FlashPixVersion: 0100 
ColorSpace: 1 
ExifImageWidth: 160 
ExifImageLength: 120 
InteroperabilityOffset: 326 
InterOperabilityIndex: THM 
InterOperabilityVersion: 0100

  4 EXERCISE   

<?php

// Run this code to see the same as the previous exercise

$img_file = "img/E 03.THM";

echo $img_file . "<br><br>";
echo '<img src="' . $img_file . '" alt="' . 
$img_file . ' apr' . '" title="' . $img_file . '" width="160"><br><br>';

$fp = fopen($img_file, 'rb');

echo '<pre>';
var_dump(exif_read_data($fp));
echo '</pre>';

fclose($fp);

?>