~~~ /** * 首字母头像 * @param $text * @return string */ function letter_avatar($text) { $total = unpack('L', hash('adler32', $text, true))[1]; $hue = $total % 360; list($r, $g, $b) = hsv2rgb($hue / 360, 0.3, 0.9); $bg = "rgb({$r},{$g},{$b})"; $color = "#ffffff"; $first = mb_strtoupper(mb_substr($text, 0, 1)); $src = base64_encode('<svg xmlns="http://www.w3.org/2000/svg" version="1.1" height="100" width="100"><rect fill="' . $bg . '" x="0" y="0" width="100" height="100"></rect><text x="50" y="50" font-size="50" text-copy="fast" fill="' . $color . '" text-anchor="middle" text-rights="admin" dominant-baseline="central">' . $first . '</text></svg>'); $value = 'data:image/svg+xml;base64,' . $src; return $value; } ~~~