在PHP中将二进制字节数组转换为图像 [英] Convert binary byte array to image in PHP

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本文介绍了在PHP中将二进制字节数组转换为图像的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!

问题描述

我在Java中有一个Web服务,它以 byte [] (字节数组)形式返回所请求的文件内容。有时这些文件是HTML文件,有时它们是图像。它的文件类型没有限制。我正在寻找一种方法将此数组转换为有效的图像/字符串。 文字文件的正常工作如下:

I have a web service in Java which returns the requested file contents in byte[] (byte array) form. Sometimes these files are HTML files and sometimes they're images. There is no restriction of which file type it is. I'm looking for a way to convert this array to a valid image/string. My working for text files is below:

    $bytes = getArray();
    $string = implode(array_map("chr", $bytes));
    echo $string;

这是 echo $ string的输出;

‰PNG  IHDR‘h6   pHYsÄÄ•+ OiCCPPhotoshop ICC profilexÚSgTSé=÷ÞôBKˆ€"KoR RB‹€‘&*! Jˆ!¡ÙQÁEEÈ ˆŽŽ€ŒQ,Š Øä!¢Žƒ£ˆŠÊûá{£kÖ¼÷æÍþµ×>ç¬ó³ÏÀ–H3Q5€©BàƒÇÄÆáä.@ $p³d!sý#ø~<<+"À¾xÓÀM›À0‡ÿêB™\€„Àt‘8K€@zŽB¦@F€˜&S `ËcbãP-`'æÓ€ø™{["! ‘ eˆDh;¬ÏVŠEX0fKÄ9Ø-0IWfH°·Àβ0Qˆ…){`È##x„™FòW<ñ+®ç*x™²<¹$9E[-qWW.(ÎI+6aaš@.Ây™24àóÌ ‘àƒóýxήÎÎ6Ž¶_-ê¿ÿ"bbãþåÏ«p@át~Ñþ,/³€;€mþ¢%îh^ u÷‹f²@µ éÚWópø~<ß5°j>{‘-¨]cöK'XtÀâ÷ò»oÁÔ(€hƒáÏwÿï?ýG %€fI’q^D$.Tʳ?ÇD *°AôÁ,ÀÁÜÁü`6„B$ÄÂBB d€r`)¬‚B(†Í°*`/Ô@4ÀQh†"p.ÂU¸=púažÁ(¼ AÈa!ÚˆbŠX#Ž™…ø!ÁH‹$ ɈQ"K‘5H1RŠT UHò=r9‡\Fº‘;È2‚ü†¼G1"²Q=ÔµC¹¨7„F¢Ðdt1š ›Ðr´=Œ6¡çЫhÚ>CÇ0Àè3Äl0.ÆÃB±8,  "c˱"¬«Æ°V¬»‰õcϱwEÀ    6wB aAHXLXNØH¨ $4Ú  7   „QÂ'""¨K´&ºùÄb21‡XH,#Ö/{ˆCÄ7$‰C2'¹I±¤TÒÒFÒnR#é,©›4H#"ÉÚdk²9", +È…ääÃä3ää!ò[ b@q¤øSâ(RÊjJåå4åe˜2AU£šRݨ¡T5ZB­¡¶R¯Q‡¨4uš9̓IK¥­¢•Óhh÷i¯ètºÝ•N—ÐWÒËéGè—èôw †ƒÇˆg(›gw¯˜L¦Ó‹ÇT071ë˜ç™™oUX*¶*|‘Ê •J•&•*/T©ª¦ªÞªUóUËT©^S}®FU3Sã©   Ô–«UªPëSSg©;¨‡ªg¨oT?¤~Yý‰YÃLÃOC¤Q ±_ã¼Æ c³x,!k «†u5Ä&±ÍÙ|v*»˜ý»‹=ª©¡9C3J3W³Ró"f?ã˜qøœtN ç(§—ó~ŠÞï)â)¦4L¹1e\kª–—–X«H«Q«Gë½6®í§¦½E»YûAÇJ'\'GgÎçSÙSݧ §M=:õ®.ªk¥¡»Dw¿n§î˜ž¾^€žLo§Þy½çú}/ýTýmú§õGX³$ÛÎ<Å5qo</ÇÛñQC]Ã@C¥a•a—á„‘¹Ñ<£ÕFFŒiÆ\ã$ãmÆmÆ£&&!&KMêMîšRM¹¦)¦;L;LÇÍÌÍ¢ÍÖ™5›=1×2ç›ç›×›ß·`ZxZ,¶¨¶¸eI²äZ¦Yn…Z9Y¥XUZ]³F­­%Ö»­»§§¹N"N«žÖgðñ¶É¶©·°åØÛ®¶m¶}agbg·Å®Ãî"½"}º}ý= ‡Ù«Z~s´r:V:ޚΜî?}Åô–é/gXÏÏØ3ã¶Ë)ÄiS›ÓGgg¹sƒóˆ‹‰K‚Ë.—>.›ÆÝȽäJtõq]ázÒõ›³›Âí¨Û¯î6îiî‡ÜŸÌ4Ÿ)žY3sÐÃÈCàQåÑ?Ÿ•0k߬~OCOgµç#/c/‘W­×°·¥wª÷aï>ö>rŸã>ã<7Þ2ÞY_Ì7À·È·ËOÃož_…ßC#ÿdÿzÿѧ€%g‰A[ûøz|!¿Ž?:Ûeö²ÙíAŒ ¹AA‚­‚åÁ­!hÈì­!÷ç˜Î‘Îi…P~èÖÐaæa‹Ã~'…‡…W†?ŽpˆXÑ1—5wÑÜCsßDúD–DÞ›g1O9¯-J5*>ª.j<Ú7º4º?Æ.fYÌÕXXIlK9.*®6nl¾ßüíó‡ââã{˜/È]py¡ÎÂô…§©.,:–@LˆN8"ðA*¨Œ%òw%Ž yÂÂg"/Ñ6шØC\*NòH*Mz’쑼5y$Å3¥,幄'©¼L LÝ›:žšv m2=:½1ƒ’‘qBª!M"¶gêgæfvˬe…²þÅn‹·/•Ék³¬Y- ¶B¦èTZ(×*²geWf¿Í‰Ê9–«ž+Íí̳ÊÛ7œïŸÿíÂá’¶¥†KW-X潬j9²‰Š®Û—Ø(Üxå‡oÊ¿™Ü"´©«Ä¹dÏfÒféæÞ-ž[–ª—æ—n ÙÚ´ ßV´íõöEÛ/—Í(Û»ƒ¶C¹£¿<¸¼e§ÉÎÍ;?T¤TôTúT6îÒݵa×ønÑî{¼ö4ìÕÛ[¼÷ý>ɾÛUUMÕfÕeûIû³÷?®‰ªéø–ûm]­NmqíÇÒý#¶×¹ÔÕÒ=TRÖ+ëGǾþïw- 6 UœÆâ#pDyäé÷  ß÷ :ÚvŒ{¬áÓvg/jBšòšF›Sšû[b[ºOÌ>ÑÖêÞzüGÛœ499â?rýéü§CÏdÏ&žþ¢þË®/~øÕë×Îјѡ—ò—"¿m|¥ýêÀë¯ÛÆÂƾÉx31^ôVûíÁwÜwï£ßOä| (ÿhù±õSЧû"""ÿ˜óüc3-Û cHRMz%€ƒùÿ€éu0ê`:˜o’_ÅFìIDATxÚÁIoUàyËŒ§3žÅN°/Ávš BÛiQ¥J=ô€¢^*nHpAøHÜøœzABÀ$$$TRDQ$$C’62‰—8Nâ‰ñÄÛxÞìoæñ} qðûÁ^Ã%¤T]ÆXl5O¿ÿqǸüo:J²ª)ÊÖÃ{Ÿ}úØš9öÌ~çÞ›èñö»\ˆ)atð²ùõ"Ÿ..NgF£B(§•ÆÑIä;•bŽã\Ô¥J)¿V)®ä–êõÃѳm‹±øÕB‡ÜÀ8ŸL®ž=¯Ó(,&–…çvE>ÇM’ÎIÏuü‚þÉ£íoßùcw÷×?ŸwÍQ»Ý1Œa±£1ÃÖtц>ä(cqÓ·>úà="’²²tÿöíF·óÍoÏ\׉CŸ"Œ9  0f²`2ªZ-¬ü°³;š«ù…ÀΦ¶šÉ6»ƒ¬¦jXÂæpŒH‰Â5m]¿þBVÿíµùî[FKMK«Çýé|k£¦¨RL#<™â0E{£VãÓZVOï7FSëã÷·oÞ¸ùùW_Ôª¥‡÷ïò¼à{!øùÉ—–íÙsWH+¼ÏOϪÅ%âÞÜ*è‹Š¾Ð1z⢬æ5Ïá¤xàêºf†Oÿn•u­Z)ëZ˜Ñ:³ÑÑÑêu>;íÞÜñÜñXÂù>Ùk­îåúÝŒ9¾šM"±9JÙ Äñt"h®X­"Pry5kœÛ;- T+}bõGãõJe.ºÔóFn¸ ‹›¯—=xwÉ^s6&6Ç(@xAí•l»×{ZßgIÐä¯"þÍ·6’„

但我不知道如何为图像文件执行此操作。我可能会以某种方式将此数组写入文件并加载图像,但我的项目不允许我这样做。我必须动态执行此操作。

But I have no idea how to do this for image files. I could somehow write this array to a file and load the image but my project doesn't allow me to do that. I have to do this on the fly.

推荐答案

如果你要做的只是向用户显示图像,你只需要在响应中提供正确的内容标题:

If all you want to do is show the image to the user, you simply need to serve the right content header with the response:

if      (substr($string, 0, 4) == "\x89PNG")  header('Content-Type: image/png');
else if (substr($string, 0, 2) == "\xFF\xD8") header('Content-Type: image/jpeg');
else if (substr($string, 0, 4) == "GIF8")     header('Content-Type: image/gif');

echo $string;

图像实际上只是一团数据(比如你所拥有的'字符串')加上一个指示它是一个图像(在HTTP中,它将是MIME头)。由于您已经拥有blob,因此只需要使浏览器将其解释为图像即可。

An image is really just a blob of data (like the 'string' you have) plus an indication that it's an image (in HTTP, that would be the MIME header). Since you already have the blob, all you need is the header to make the browser interpret it as an image.

这篇关于在PHP中将二进制字节数组转换为图像的文章就介绍到这了,希望我们推荐的答案对大家有所帮助,也希望大家多多支持IT屋!

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