At the same time, there are a number of functions that can be implemented in a variety of ways, which require flexible application. Only remember these functions, to develop a dynamic web site, and only more practice, the entire site development once, can be skilled in the next development, only to find their own deficiencies and improve.
Many methods can be improved, such as this counter:
Instance 24 counter
Copy Code code as follows:
<?php
Counter
function Countx ($file = "Count.dat") {
if (file_exists ($file)) {
$FP =fopen ($file, "R");
$numx =fgets ($FP, 10);
Fclose ($FP);
$numx + +;
The above four lines of code can be replaced by an expression: $numx =file_get_contents ($file) +1;
}
else{
$NUMX = 1;}
File_put_contents ($file, $NUMX);//When the file does not exist, this function automatically creates the file and automatically turns the argument into a string write.
Echo $numx;
/* The entire function body can be replaced by two expressions: File_exists ($file)? file_put_contents ($file, file_get_contents ($file) +1): File_put_contents ($ File, "1"); ReadFile ($file);
*/
}
Function call
Countx ();
?>
There are many ways to achieve this, let's think about it.
Finally, this example is used to debug the calculation of the use of the code to run the time, the unit is seconds to five decimal output, equivalent to search engine time, commonly used in SQL optimization, code as follows:
Instance 25 calculates the time it takes to run the code, optimizing the Code
Copy Code code as follows:
<?php
$ftime =microtime ();
Countx ()//Here is the code that calculates the time it takes to run, which is the function that invokes the previous example.
$ftime =number_format ((Microtime ()-$ftime), 5);
Echo $ftime;
?>
I this tutorial basically takes the example mainly, rarely tells, these code is not difficult, the function is also selects carefully, my goal is can use quickly, for instance can handle Chinese, if I copy the book to say can only handle English function, that what use? Or I take out the function you can't use, it's a waste of time.
I do not speak simple grammar, but I believe that through representative examples of practice, the grammar and the basis are not a problem. There is this tutorial is my first, intermediate people, the development of practical sites enough. I will also have a higher level of tutorials, such as sock, XML, ZIP, PDF, mail and other class library development, and write their own cms. I strive to understand the fastest, not to be faster understand it!
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