Operation Basis of thinkphp (II.)

1. $readTime _rank_result=m (' blog ')->order (' Breadtime DESC ')->limit (3)->select ():

A. The return value is a dataset, which can be output in the foreground using the following method:

<volist name= "Readtime" id= "R" >

{$r. Id} nbsp; {$r. Time} </br>//or: {$r [' Id ']} nbsp; {$r [' Time ']}

</volist>

You can also use the loop output:

<foreach name= "Readtime" item= "R" >

{$r. Id} nbsp; {$r. Time} </br>//or: {$r [' Id ']} nbsp; {$r [' Time ']}

</foreach>

The two cycle methods are identical;

B.thinkphp does not support the top () method in SQL, but the built-in limit function can do the same thing.

2. Differences in output methods:

Echo: A single character, string for the input, no output array, no data set, only one output: array; (PHP method)

Var_dump: Printing of long, variable and array, automatically formatted; (PHP method)

Print_r: With Var_dump;

3. In thinkphp, all hyperlink jumps are best implemented using the U function, the format is: U (' Controller name/method name '), if the method is in the controller of this page, then can be written directly to U (' method name ');