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$abc='my name is tome';
echo $abc //½á¹ûÊÇ:my name is tom
echo '$abc' //½á¹ûÊÇ:$abc
echo "$abc" //½á¹ûÊÇ:my name is tom
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SQLstr = "select    *    from abc_table where user _name= 'abc'" ;
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$user=array ("name"=>
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SQLstr = "select    *    from abc_table where user_name = ' " .
$user_name . " ' ";
SQLstr = "select * from abc_table where user_name = ' " .
$user["name"] . " ' ";
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SQLstr="select * from abc_table where user_name = ' abc ' " ;
SQLstr="select * from abc_table where user_name =' " . $user _name .
" ' ";
SQLstr="select * from abc_table where user_name =' " . $user["name"]
. " ' ";
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how to install apache, PHP and MySQL on Linux
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