我有以下 php 代码:
<?php
header('Content-Type: text/HTML; charset=utf-8');
header( 'Content-Encoding: none; ' );
//$cmd = "pdf2htmlEX --zoom 1.3 --override-fstype 1 --hdpi 720 --dest-dir test test/test_data/Harsh_Singh_191_Marketing_IM18.pdf";
$cmd = "ping 127.0.0.1";
$descriptorspec = array(
0 => array("pipe", "r"), // stdin is a pipe that the child will read from
1 => array("pipe", "w"), // stdout is a pipe that the child will write to
2 => array("pipe", "w") // stderr is a pipe that the child will write to
);
flush();
$process = proc_open($cmd, $descriptorspec, $pipes);
echo "<pre>";
if (is_resource($process)) {
while ($s = fgets($pipes[1])) {
print $s;
flush();
}
}
echo "</pre>";
?>
当 $cmd 设置为“ping 127.0.0.1”时,此代码可以正常工作,并实时提供 php 输出:
Pinging 127.0.0.1 with 32 bytes of data:
Reply from 127.0.0.1: bytes=32 time<1ms TTL=64
Reply from 127.0.0.1: bytes=32 time<1ms TTL=64
Reply from 127.0.0.1: bytes=32 time<1ms TTL=64
Reply from 127.0.0.1: bytes=32 time<1ms TTL=64
Ping statistics for 127.0.0.1:
Packets: Sent = 4, Received = 4, Lost = 0 (0% loss),
Approximate round trip times in milli-seconds:
Minimum = 0ms, Maximum = 0ms, Average = 0ms
但是 pdf2htmlEX 命令,即 $cmd = "pdf2htmlEX --zoom 1.3 --override-fstype 1 --hdpi 720 --dest-dir test test/test_data/Harsh_Singh_191_Marketing_IM18.pdf" 不起作用。它确实转换文件并在目录中提供输出,但网页上没有任何内容。我怎样才能让它工作?