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imagesavealpha
Examples
imagesavealpha
PHP 4 >= 4.3.2, PHP 5, PHP 7, PHP 8
imagesavealpha - Whether to retain full alpha channel information when saving PNG images
Manual
Code Examples
Example #1 Basic imagesavealpha Usage
<?php // Load a png image with alpha channel $png = imagecreatefrompng('./alphachannel_example.png'); // Turn off alpha blending imagealphablending($png, false); // Do desired operations // Set alpha flag imagesavealpha($png, true); // Output image to browser header('Content-Type: image/png'); imagepng($png); imagedestroy($png);
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PHP Version:
8.3.12
8.2.24
8.1.30
8.0.30
7.4.33
7.3.33
7.2.34
7.1.33
7.0.33
5.6.40
5.5.38
5.4.45
5.3.29
5.2.17
5.1.6
5.0.5
4.4.9
4.3.11
4.2.3
4.1.2
4.0.6
8.3.12
8.3.11
8.3.10
8.3.9
8.3.8
8.3.7
8.3.6
8.3.5
8.3.4
8.3.3
8.3.2
8.3.1
8.3.0
8.2.24
8.2.23
8.2.22
8.2.21
8.2.20
8.2.19
8.2.18
8.2.17
8.2.16
8.2.15
8.2.14
8.2.13
8.2.12
8.2.11
8.2.10
8.2.9
8.2.8
8.2.7
8.2.6
8.2.5
8.2.4
8.2.3
8.2.2
8.2.1
8.2.0
8.1.30
8.1.29
8.1.28
8.1.27
8.1.26
8.1.25
8.1.24
8.1.23
8.1.22
8.1.21
8.1.20
8.1.19
8.1.18
8.1.17
8.1.16
8.1.15
8.1.14
8.1.13
8.1.12
8.1.11
8.1.10
8.1.9
8.1.8
8.1.7
8.1.6
8.1.5
8.1.4
8.1.3
8.1.2
8.1.1
8.1.0
8.0.30
8.0.29
8.0.28
8.0.27
8.0.26
8.0.25
8.0.24
8.0.23
8.0.22
8.0.21
8.0.20
8.0.19
8.0.18
8.0.17
8.0.16
8.0.15
8.0.14
8.0.13
8.0.12
8.0.11
8.0.10
8.0.9
8.0.8
8.0.7
8.0.6
8.0.5
8.0.4
8.0.3
8.0.2
8.0.1
8.0.0
7.4.33
7.4.32
7.4.30
7.4.29
7.4.28
7.4.27
7.4.26
7.4.25
7.4.24
7.4.23
7.4.22
7.4.21
7.4.20
7.4.19
7.4.18
7.4.17
7.4.16
7.4.15
7.4.14
7.4.13
7.4.12
7.4.11
7.4.10
7.4.9
7.4.8
7.4.7
7.4.6
7.4.5
7.4.4
7.4.3
7.4.2
7.4.1
7.4.0
7.3.33
7.3.32
7.3.31
7.3.30
7.3.29
7.3.28
7.3.27
7.3.26
7.3.25
7.3.24
7.3.23
7.3.22
7.3.21
7.3.20
7.3.19
7.3.18
7.3.17
7.3.16
7.3.15
7.3.14
7.3.13
7.3.12
7.3.11
7.3.10
7.3.9
7.3.8
7.3.7
7.3.6
7.3.5
7.3.4
7.3.3
7.3.2
7.3.1
7.3.0
7.2.34
7.2.33
7.2.32
7.2.31
7.2.30
7.2.29
7.2.28
7.2.27
7.2.26
7.2.25
7.2.24
7.2.23
7.2.22
7.2.21
7.2.20
7.2.19
7.2.18
7.2.17
7.2.16
7.2.15
7.2.14
7.2.13
7.2.12
7.2.11
7.2.10
7.2.9
7.2.8
7.2.7
7.2.6
7.2.5
7.2.4
7.2.3
7.2.2
7.2.1
7.2.0
7.1.33
7.1.32
7.1.31
7.1.30
7.1.29
7.1.28
7.1.27
7.1.26
7.1.25
7.1.24
7.1.23
7.1.22
7.1.21
7.1.20
7.1.19
7.1.18
7.1.17
7.1.16
7.1.15
7.1.14
7.1.13
7.1.12
7.1.11
7.1.10
7.1.9
7.1.8
7.1.7
7.1.6
7.1.5
7.1.4
7.1.3
7.1.2
7.1.1
7.1.0
7.0.33
7.0.32
7.0.31
7.0.30
7.0.29
7.0.28
7.0.27
7.0.26
7.0.25
7.0.24
7.0.23
7.0.22
7.0.21
7.0.20
7.0.19
7.0.18
7.0.17
7.0.16
7.0.15
7.0.14
7.0.13
7.0.12
7.0.11
7.0.10
7.0.9
7.0.8
7.0.7
7.0.6
7.0.5
7.0.4
7.0.3
7.0.2
7.0.1
7.0.0
5.6.40
5.6.39
5.6.38
5.6.37
5.6.36
5.6.35
5.6.34
5.6.33
5.6.32
5.6.31
5.6.30
5.6.29
5.6.28
5.6.27
5.6.26
5.6.25
5.6.24
5.6.23
5.6.22
5.6.21
5.6.20
5.6.19
5.6.18
5.6.17
5.6.16
5.6.15
5.6.14
5.6.13
5.6.12
5.6.11
5.6.10
5.6.9
5.6.8
5.6.7
5.6.6
5.6.5
5.6.4
5.6.3
5.6.2
5.6.1
5.6.0
5.5.38
5.5.37
5.5.36
5.5.35
5.5.34
5.5.33
5.5.32
5.5.31
5.5.30
5.5.29
5.5.28
5.5.27
5.5.26
5.5.25
5.5.24
5.5.23
5.5.22
5.5.21
5.5.20
5.5.19
5.5.18
5.5.17
5.5.16
5.5.15
5.5.14
5.5.13
5.5.12
5.5.11
5.5.10
5.5.9
5.5.8
5.5.7
5.5.6
5.5.5
5.5.4
5.5.3
5.5.2
5.5.1
5.5.0
5.4.45
5.4.44
5.4.43
5.4.42
5.4.41
5.4.40
5.4.39
5.4.38
5.4.37
5.4.36
5.4.35
5.4.34
5.4.33
5.4.32
5.4.31
5.4.30
5.4.29
5.4.28
5.4.27
5.4.26
5.4.25
5.4.24
5.4.23
5.4.22
5.4.21
5.4.20
5.4.19
5.4.18
5.4.17
5.4.16
5.4.15
5.4.14
5.4.13
5.4.12
5.4.11
5.4.10
5.4.9
5.4.8
5.4.7
5.4.6
5.4.5
5.4.4
5.4.3
5.4.2
5.4.1
5.4.0
5.3.29
5.3.28
5.3.27
5.3.26
5.3.25
5.3.24
5.3.23
5.3.22
5.3.21
5.3.20
5.3.19
5.3.18
5.3.17
5.3.16
5.3.15
5.3.14
5.3.13
5.3.12
5.3.11
5.3.10
5.3.9
5.3.8
5.3.7
5.3.6
5.3.5
5.3.4
5.3.3
5.3.2
5.3.1
5.3.0
5.2.17
5.2.16
5.2.15
5.2.14
5.2.13
5.2.12
5.2.11
5.2.10
5.2.9
5.2.8
5.2.7
5.2.6
5.2.5
5.2.4
5.2.3
5.2.2
5.2.1
5.2.0
5.1.6
5.1.5
5.1.4
5.1.3
5.1.2
5.1.1
5.1.0
5.0.5
5.0.4
5.0.3
4.4.9
4.4.8
4.4.7
4.4.6
4.4.5
4.4.4
4.4.3
4.4.2
4.4.1
4.4.0
4.3.11
4.3.10
4.3.9
4.3.8
4.3.7
4.3.6
4.3.5
4.3.2
4.3.1
4.3.0
4.2.3
4.2.2
4.2.1
4.2.0
4.1.2
4.1.1
4.1.0
4.0.6
8.3.0RC5
8.3.0RC4
8.3.0RC3
8.3.0RC2
8.3.0RC1
8.3.0beta2
8.3.0beta1
8.3.0alpha3
8.3.0alpha2
8.3.0alpha1
Function imagesavealpha:
Manual
Code Examples
Image Processing and GD Functions
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imageaffinematrixget
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imagegrabwindow
imageinterlace
imageistruecolor
imagejpeg
imagelayereffect
imageline
imageloadfont
imageopenpolygon
imagepalettecopy
imagepalettetotruecolor
imagepng
imagepolygon
imagerectangle
imageresolution
imagerotate
imagesavealpha
imagescale
imagesetbrush
imagesetclip
imagesetinterpolation
imagesetpixel
imagesetstyle
imagesetthickness
imagesettile
imagestringup
imagestring
imagesx
imagesy
imagetruecolortopalette
imagettfbbox
imagettftext
imagetypes
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image_type_to_mime_type
imagewbmp
imagewebp
imagexbm
iptcembed
iptcparse
jpeg2wbmp
png2wbmp
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