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$s = "new string";
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$str_1 = "Ë«ÒýºÅÖ¸¶¨µÄ×Ö·û´®£¬$s";
//ÏÂÃæË«ÒýºÅ×Ö·û´®ÖеķûºÅ"$"×öÁËתÒ壬Òò´Ë$sÔ­·â²»¶¯£¬²»»á±»Ì滻Ϊ±äÁ¿$sµÄÖµ
$str_2 = "Ë«ÒýºÅÖ¸¶¨µÄ×Ö·û´®£¬\$s";
//µ¥ÒýºÅ×Ö·û´®ÖеÄ"$"²»ÓÃ×öתÒå¼´¿ÉÔ­ÑùÊä³ö
$str_3 = 'µ¥ÒýºÅÖ¸¶¨µÄ×Ö·û´®£¬$s';
$str_4 = 'µ¥ÒýºÅÖ¸¶¨µÄ×Ö·û´®£¬\$s';
//ÔÚË«ÒýºÅ×Ö·û´®ÖУ¬Êä³ö$¡¢"¡¢\µÈÌØÊâ×Ö·û£¬ÐèÒª×öתÒå
$str_5 = "ÔÚË«ÒýºÅ×Ö·û´®ÖУ¬Êä³öÌØÊâ×Ö·û£º\$ \" \\ '";
//ÔÚµ¥ÒýºÅ×Ö·û´®ÖУ¬Êä³ö'£¬ÐèÒª×öתÒå
$str_6 = 'ÔÚµ¥ÒýºÅ×Ö·û´®ÖУ¬Êä³öÌØÊâ×Ö·û£º$ " \ \'';
echo $str_1;
echo "<br/>";
echo "<br/>";
echo $str_2;
echo "<br/>";
echo "<br/>";
echo $str_3;
echo "<br/>";
echo "<br/>";
echo $str_4;
echo "<br/>";
echo "<br/>";
echo $str_5;
echo "<br/>";
echo "<br/>";
echo $str_6;
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<?php
$a = 1;
function b(&$c)
{
$c++;
return $c;
}
$d=b($a); // d = 2; a = 2;
$d++; // d = 2;
echo($a); // ÏÔʾ2
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$a = 1;
function &b(&$c)
{
$c++;
return $c;
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