我正在尝试从数据库中获取 Base64 编码图像并将其保存到文件中。无论出于何种原因,当我尝试使用 imagecreatefromstring 和 imagepng 时,图像完全是黑色的。我尝试了很多不同的方法,但最终还是得到了一个黑匣子。以下是我让它发挥作用的最佳尝试。有任何想法吗?提前非常感谢!
$thefile = base64_decode($strImage);
$img = imagecreatefromstring($thefile);
if($img !== false)
{
header('Content-Type: image/png');
imagepng($img);
imagedestroy($img);
}
应该是上面的,但是格式看起来不正确......
$strImage='iVBORw0KGgoAAAANSUhEUgAAA4QAAAD6CAYAAAD5jokXAAAMrUlEQVR4nO3dPahkZxkH8P+CkiqlaKGojcHCr9gEBBsbu5QiSRXBTksRsUijwcI0IorBD4gGGwvxC4soKLEQImiMRgMmMYmRGDbZbLJ7d++9Zy3OP dzZ2bv3zuzMnOd8/H4wxe4O8z4zmWL+ed73fRIAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAABG4ukkzQmPgyQXkjxcVxoAAAC78kba8HeY5OrRY//oz4vhcL+qQAAAAHanOeXfPpe2U9gFw2d6qQgAAIBeXFvhOa9 FtxAAAGByTusQLlvsFr68m3IAAADoyyodwkW6hQAAABOXTodwUdctPNxiLQAAAPRo3Q7hor0cdwtf3U45AAAA9GWTQJgkP48tpAAAAKN0q1tGl9lCCgAAMDKbdggXLW4h/d0WXxCAAIAd2GYGTI63kF5L8uaWXxsAAIAt2 taW0WWHR6+9t6PXBwAAYEPb7hAuEgoBAAAGbJeBMBEKAQAABmtXW0YXCYUAAAADtOsOYUcoBAAAGJi+AmEiFAIAAAxKn4EwEQoBAAAGo48zhMu6UHi5YG0AAACO9N0h7HSh8N9F6wMAAMxeVSBM2kDYJPl4YQ0AAACzVRkIf5 DjUAGAAEDPKgNhkryWNHAeFtcBAAAwO0Pozu2lreOguhAAAIA5qe4QdvbThsKr1YUAAADMxVACYdJ2CJskF6sLAQAAmIMhBcLEJTMAAAC9GVogvJw2EL5RXQgAAMDUDS0QJrqEAAAO3d3hhm8Xk9b1151IQAAAFPWJLLUXc QJDjPMsAoAADBoz6e9sfPyCs9t0o58GJqnYwwFAADA2tYZ8t6k7cYNkS4hAADAmta5KGbIgfCBrBduAQAAZm+dQDj0Llw3rP5cdSEAAABjsE4g7ALXkA25iwkAADAo6wS8K2s+v0IXWr9fXQgAAMD QrXM7508z/ECY6BICAACsZN3wtM4W0ypdJ/Of1YUAAAAM2boXxYwhECa6hAAAAGda96KYsQTCMVyAAwAAUOrlrDeqYSyBMGnf1351EQAAAEO2zsUyYwqEQ5+bOCUvpu3KfrFg7fMFawIAwGSsc95utIHw2bTv7XJx HXPRbdP9bc/rCv0AALCBdTppYwqESfu+BIb+VHw/xvadBACAQdnPdAPhG2nf24PVhcyEQAgAACPzStrQ9LUVnjvGH99jrHmsBEIAABihVS+WGeP2S4GhP31/P24vWBMAACZn1YtlxhiuxljzWFV81k2SbxWscCwaAk 7HqxTJjDFdjrHmsqgLhcwXrAgDAZHQjA84yxnA1xprHquKzPkhypWBdAACYjO5imXNnPG+M4apJzcD0Oar4fpyPc4QAALCxVS6WGVsgvBphoU8V34/ fxH9JAADY2CoXy4wtEK56NpLNnUvNZ/2BrNbdBgAATrFKeBpbIFz19lS2o0nyy6J1bQsGAIANXMk0A+FBdREz0iR5rWjdPxSsCwAAk9Ft+bt4ynPGFAj/nvb9uIGyP02S/YJ1D9JejAQAAGzgrI7 aWM7j7cV20QpVn/nFnH0hEgAAcIYmp4e+MXQIhcE6VZ/7UxnP/6waAAIDBOmtA/dADotBYq+pW1+8WrQsAAJPyatof1g/c5N+HHAi7S3GEwTpVgfD9MXoCAAC24rSLQYYACA/S1uZG0VpndZ h3qUnyzaK1AQBgMk7rsg0tEF7N8blHYbDepdQFwr0kzxetDQAAK3Fal2cogfBijoPgYZLP1JbDkb+mLhA+mZqRFwAAMCkX0v6of+Sef6sOhHfl+Jxa1RB0bu7DqQuEny9cGwAAJuVm5wirAuGFXB8EDZsfrib JjwrX/mzR2gAAMBk3O0fYdyDcz3EidE5wHJokLxWtvZ/kz0VrAwDAZNzsHGEfgXC5G3h49HeMQ5P2gpcKLya5XLQ2AABMxitpf9jfs/T3uwyEy91AF4SMU2Un96E4RwgAAFvRpB0jsGjbgfBK DAOn5rSxJbt2+9H6dxatDwAAk3FSl24bgXA5BOoGTktlIOzW/1Xh+ GAAMAkn/bDfJBBezo0h8NwGr8cwdWG/yoUkrxauDwAAk7DtQJij17uW64PhWY/Do8dBkqtph9ILksNVHQgfTW2HEgaAAJuGkH/bb2DL6Ztpgd9rjIMdBcJXQeJA2CFCvuxyoyl1H699WWAMAAIzeSaMnqgbTL/tS 2gtv9nNjaDxMGyp1EWtcSP1NnwdJvlFcAwAAjNqVDDcQnuS5HIfY5YD4ZmFdc/PH1AfCZ9LOJAQAAG7Rf9L+sF/sta05EC67nJO7h8ujNNiud6c+EH4lzhECAMDGlkdCVP/Qv1V35sbB94dJni2s acqaJF8vXP8tRzV8srAGAAAYveWbRsfUIbyZ7+XGraUHSe6tLGpimiR/K67hYpLHimsAAIBRW75YZgqBcNGF3Lit1IU0m2uSvF5cw6OxPRgAADbS3Rj5w6M/Ty0QLtrLjVtK7ymtaLy6YF3pQ0d1vL W4DgAAGLXFc4RTDoSLFs8bCobrW95qXOVSkvuqiwaAAgDFb/HE/l0DYWTxrKBiubiiB8E9JflldBAAAjNniOcK5BcKOYLieoQTCryZ5uboIAAAYs1fS/sD/dOYbCDvLwfAfteUMVndRT7X3pK3jtuI6AABg1Jq0l6 7MPRB2FoPhleJahmgogTBxjhAAADbWzeoTCK/XBcoD6kIGZnlcSSXnCAEAYEPdFkmB8EbdjaRDODM3FJcynEDoHCEAAGxocXg7N1qcYWioffJChvNdeW/abb3mEQIAwC3qtgDqEN7cazkOhb8vrqXazzKcQJgkP07yheoiAABgr LotgALh6b6T41D4RHEtld6ZYQXCdyV5uLoIAAAYM4Fwdd1n9WZ1IYWaJN+ulgIAANngOgXA93bnLvepCijRJ/lVdBAAAsB0C4frmHAqbzLtDCgAAk2LsxK2Zayg0nxEAACZEILx1cwyFZjMCAMCEXI1Au IludMcb1YX0RCAEAIAJeTxtIDR4/dbNaRtl1xUFAAAmQodwM3MKSXN6rwAAMAsC4WauZj4h6Urm814BAGAWBMLNNWnD0tT9LwIhaAABMikC4ublctvKbCIQAADApAuHmuttGp+6OzON9AgDAbAiEm3skbVA6X11ID5okP6 ouAgAAYEjmsm20SfJSdREAAABDMperRDHO5QAcAAGBl59OGpU9VF7Jjc+MEAGAARKVJO5dwygRCAACAE8whLM1laywAAMBa5hCW9jP99wgAALC2OcwjvJDpv0cAAIC1PZo2LJ3rcc2+ u5KP9bweAADAaFzreb1Xel7z/rSB8O09rgkAADAKfQfCijXncHkOAADA2voOZ/em/22qvz5a84M9rgkAADB4FR3CJu3tn32qeJ8AAACDtZ+6QNjnFs6fHK35iR7XBAAAGKQH0wakJsmVgvUrxl10 4yfu73ldAACAQbg7x2MfmiQvFNXxl6P1P1q0PgAAwGycy/VB8KC2nCTDqQMAAGBy7svx1swhBcFO3wPqAQAAJu1Sru8Edo++b/RcxVNpa/tIdSEAAABj8r4ke2k7ficFwMMkr5ZVt7omydXqIgAAgGn5Vd qw9LHqQjZ0IW1376TQtxwA95PcUVPMLet7/AQAADATQwsb9yY5n3bMw36Ou3tnhb3F0NcFv9/3XPuuOEcIAADsxMW0Q9dXCVvVj8OFx0Ha0Pfk9j+SwamYRwgAAMzE+brn1Cofe0me2PUb HalfpA2E76guBAAAgP4N9RZUAAAAdmxoZz0BAADoiXOEAAAAM/VQ2kD4tupCAAAA6N+16gIAAACoIRACAAADMlEAIAAAwUwIhaAADATAmEAAAAMyUQAgAAzJQ5hAAAADP037SB8MvVhQAAANC/g7Sh8PHqQgAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA啊哈哈哈哈哈哈哈哈哈哈哈哈哈哈哈哈哈哈哈哈哈哈哈哈哈哈哈哈哈哈哈哈哈哈哈哈哈哈哈哈哈哈哈哈哈哈哈哈哈哈哈哈哈哈哈哈哈哈哈哈哈哈哈哈哈哈哈哈哈哈哈哈哈哈哈哈哈哈哈哈哈哈哈哈哈哈哈哈哈哈哈哈哈哈哈哈哈哈哈哈哈哈哈哈哈哈哈哈哈哈哈哈哈哈哈哈哈哈哈哈哈哈哈哈哈哈哈哈哈哈哈哈哈哈哈哈哈哈哈哈哈哈哈哈哈哈哈哈哈哈哈哈哈哈哈哈哈哈哈哈哈哈哈哈哈哈哈哈哈哈哈哈哈哈) AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAACAbfo/R04U3Pjl9j8AAAAASUVORK5CYII=';
在 imagepng() 之前调用 imagesavealpha()
imagesavealpha($img, true);
imagepng($img);
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