php cli using STDIN and Piping

http://php.net/manual/en/features.commandline.options.php
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-r <code>        Run PHP <code> without using script tags <?..?>

例：

1.  cat xxx.log | php -r 'echo stream_get_contents(STDIN)."\n";'

// STDIN is just a shortcut of $fh = fopen("php://stdin", "r"); 

2. cat access.log | php -r 'echo readfile("php://stdin")."\n";'

 

3. read  by line:
cat access.log | php -r 'while (!feof(STDIN)){ echo fgets(STDIN); };'

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-R <code>        Run PHP <code> for every input line

-R

--process-code

PHP code to execute for every input line. Added in PHP 5. There are two special variables available in this mode: $argn and $argi. $argn will contain the line PHP is processing at that moment, while $argi will contain the line number.

例：

cat /xxx.log | php -R 'echo $argi . ":" . $argn . "\n";'

 

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-f <file>        Parse and execute <file>.

-F <file>        Parse and execute <file> for every input line

例：

If you want it to show up in $argv, try this:

echo "Whatever you want" | xargs php script.php

That would covert whatever goes into standard input into command line arguments.

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http://stackoverflow.com/questions/5891888/piping-data-into-command-line-php