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One, random number and timeRandom number generator (JS:math.random)echo rand ();Generate a random number in a rangeecho rand (0,10);Time stampecho Time ();Format the display of timeecho "echo Date ("Y-m-d h:i:s", Time ());echo "echo Date ("Y-m-d h:i:s", "101506494366");Convert String to Timestampecho "

Dhesi# The script is modified .) Sed '/^ end/,/^ begin/d' file1 file2... fileX | uudecode # vers. 1Sed '/^ end/,/^ begin/d' "$ @" | udecode # vers. 2# Sort the paragraphs in the file alphabetically. Paragraphs are separated by (one or more) blank rows. Use GNU sed# The character "\ v" is used to represent vertical tabs. It is used as a placeholder for line breaks-you can also# Replace it with other characters that are not used in the file.Sed '/. /{H

URL) File_put_contents ()-? Writing a string to a file is the same as calling the fopen (), fwrite (), and fclose () functions in turn. File_put_contents (file name, write data) Feof () -- test whether the file pointer is at the end of the file Ftell () -- returns the read/write position of the file pointer. Syntax format: ftell (file pointer) Flock ()-Lightweight consultation file locking Syntax format: flock (file pointer, control parameter) File pointer: it is a file pointer control param

Some shopping cart will use PHP filesMain. php display productAdditem. php add items to the shopping cartCearcart. php delete the item in the shopping cartShoppingcart. php operation classUser database tutorials include: The code is as follows:Copy code InventoryCreate table inventory (Product tinytext not null,Quantity tinytext not null,Id int (4) default '0' not null auto_increment,Description tinytext not null,Price float (10, 2) defaul

The code is as follows Copy Code $globals ["id"] = 1;$jibie = 1;$sql = "SELECT * from Tvmenu where bid=0";$result =mysql Tutorial _query ($sql, $conn); if (mysql_num_rows ($result) >0)Treemenu ($conn, $result, $jibie, $id);function Treemenu ($conn, $result, $jibie)//go into functional loops{$numrows =mysql_num_rows ($result);echo "for ($rows =0; $

warning or error message is displayed.7. Custom error handling functions. */ // 1. built-in exception handling class. Class exception{Protected $ message = 'unknown exception'; // exception informationProtected $ code = 0; // custom exception codeProtected $ file; // file name with an exceptionProtected $ line; // The code line number with an exception Function _ construct ($ message = null, $ code = 0 ); Final function getmessage (); // returns

Shell may often see: Echo log>/dev/null 2> 1 Command results can be defined in the form of %>/Dev/null: Indicates an empty device file.>: Indicates the redirection location, for example, Echo "123">/home/123.txt1: Indicates stdout standard output. The default value is 1. T

pointer.Syntax format: ftell (File pointer)Flock ()-lightweight consultation file lockingSyntax format: flock (File pointer, control parameter)File pointer: it is a file pointer control parameter that has been opened (fopen:"LOCK_SH" indicates that the shared lock (read program) is to be obtained (Set 1 in PHP4.0.1 or earlier versions )."LOCK_EX" indicates to obtain an exclusive lock (Write Program) (set to 2