<?php
use kamermans\Command\Command;
require_once __DIR__ . '/../vendor/autoload.php';
$filename = __DIR__ . '/../README.md';
$stdin = fopen($filename, 'r');
// This will read README.md and grep for lines containing 'the'
$cmd = Command::factory("grep 'the'")->setCallback(function ($pipe, $data) {
// Change the text to uppercase
$data = strtoupper($data);
if ($pipe === Command::STDERR) {
Command::echoStdErr($data);
} else {
echo $data;
}
})->run($stdin);
fclose($stdin);
require_once __DIR__ . '/../vendor/autoload.php';
// After this many callbacks, stop the command
$max_lines = 20;
// This will be incremented on each callback
$lines = 0;
// This is used in setCallback() to break on each line
$use_lines = true;
// This callback will be called for every line of output
$output_callback = function ($pipe, $data) use($max_lines, &$lines) {
if ($pipe === Command::STDERR) {
if ($data === null) {
// We've hit EOF on STDERR
return;
}
// send everything from STDERR to our STDERR
Command::echoStdErr("STDERR: " . strlen($data) . "\n");
return;
}
// We've reached EOF on STDOUT
if ($data === null) {
return;
}
echo $data;
$lines++;
// If we return "false" all pipes will be closed
if ($lines >= $max_lines) {
return false;
}
};
// Create the command, assign the callback and run it
$cmd = Command::factory('cat /var/log/syslog')->setCallback($output_callback, $use_lines)->run();
