7za-php to perform Linux command decompression files

Php7zalinux

Linux Web Directory has a "pic.7z" compression package and a PHP file a.php, compressed package has a picture "picture _a.png", a.php file content is " ".
When I lose the same decompression command from the command line or execute PHP a.php can normally extract the image to the AAA directory and the picture file name is correct, but when I access a.php from the browser, although can also extract the picture, but the picture file name has become "??? _a.png "(not the coding inconsistency caused by the display problem, but the real garbled), how is this going? (I tried this on another server without any problems, the initial suspicion is the server environment problem ...) ）

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