php - exec 函数不返回所有行

Question

我的 awk 命令按预期工作并在命令提示符处返回 2 行。

当我使用 php 的“exec”函数时，它只返回第二行。

echo exec("awk -v RS=\",\" '/some_text/' test1.html");

如何使用 PHP 返回 shell 命令的所有输出？

Answer 1

Return Values

The last line from the result of the command. If you need to execute a command and have all the data from the command passed directly back without any interference, use the passthru() function.

Returns false on failure.

To get the output of the executed command, be sure to set and use the output parameter.

它只返回最后一行输出所以使用:

output

If the output argument is present, then the specified array will be filled with every line of output from the command. Trailing whitespace, such as \n, is not included in this array. Note that if the array already contains some elements, exec() will append to the end of the array. If you do not want the function to append elements, call unset() on the array before passing it to exec().

http://php.net/manual/en/function.exec.php

exec("awk -v RS=\",\" '/some_text/' test1.html", $out);
foreach($out as $line) {
    echo $line;
}