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D:\AppServ\php5>php -help
Usage: php [options] [-f] <file> [--] [args...]
       php [options] -r <code> [--] [args...]Ö±½ÓÖ´ÐдúÂë
       php [options] [-B <begin_code>] -R <code> [-E <end_code>] [--]
[args...]
       php [options] [-B <begin_code>] -F <file> [-E <end_code>] [--]
[args...]
       php [options] -- [args...]
       php [options] -a
  -a               Run interactively½»»¥ÔËÐÐ
  -c <path>|<file> Look for php.ini file in this directoryÔÚÕâ¸öĿ¼Ѱ
ÕÒphp.iniÎļþ
  -n               No php.ini file will be used²»Ê¹ÓÃphp.iniÎļþ
  -d foo[=bar]     Define INI entry foo with value 'bar'
  -e               Generate extended information for debugger/profiler
  -f <file>        Parse and execute <file>.
  -h               This help
  -i               PHP informationÀàËÆphpinfo()º¯Êý
  -l               Syntax check only (lint)
  -m               Show compiled in modules
  -r <code>        Run PHP <code> with


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<?php
    $txt1 = "Hello";
    $txt2 = "PHP";
    echo $txt1." ".$txt2;
?>
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<?php
    $txt1 = "Abc";
    echo strlen($txt1);
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 <form id="textarea_test" action="textarea.php" method="post">
<textarea cols="50" rows="5" name="aa" id="abc" >

<?php
$str = $_POST['aa'];
//var_dump($str);
//$str = "chenjinle le";
$array = explode("\n", trim($ ......
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