microtime true

A reference to a foreach$arr = Range (1,3//foreach as &foreach as $val) {} print_r ($arr);What does the above code output?Array ( [01 [12 [22 )This is because of the reference to the variable in the source of the foreach. Causes its

Compare the efficiency of strtr, str_replace, and preg_replace functions. The source code of strtr has been analyzed before, and the efficiency of strtr, str_replace and preg_replace is compared Now: The copy code is as follows: $ str1111111111111_1_

The source code of strtr has been analyzed before. Now we can compare the efficiency of strtr, str_replace and preg_replace: Copy codeThe Code is as follows: $ str = '2017 '; $ Str = str_repeat ($ str, 1 ); $ Pattern1 = array ('000000' => '', '000000

Previously analyzed STRTR's source code, now compare Strtr, str_replace and preg_replace efficiency: Copy Code code as follows: $str = ' 111111110000000000000000000000000000000111000001000100010000010010000010010000010100000010 '; $str =

Previously analyzed STRTR's source code, now compare Strtr, str_replace and preg_replace efficiency: Copy Code code as follows: $str = ' 111111110000000000000000000000000000000111000001000100010000010010000010010000010100000010 ';

Test 1 1, less operation elements, a single element is larger, English, 3 elements to operate 1000 times The code is as follows Copy Code $data = Array (' Hello ', ' word ');$d = "Helloword";$d = Str_repeat ($d,

This article provides a detailed analysis of the efficiency of strtr, str_replace, and preg_replace functions. For more information, see the source code of strtr, now we can compare the efficiency of strtr, str_replace and preg_replace: The code

This article provides a detailed analysis of the efficiency of strtr, str_replace, and preg_replace functions. For more information, see This article provides a detailed analysis of the efficiency of strtr, str_replace, and preg_replace functions.

Have analyzed the source of strtr before, now compare Strtr, str_replace and preg_replace efficiency: Copy CodeThe code is as follows: $str = ' 111111110000000000000000000000000000000111000001000100010000010010000010010000010100000010 '; $str = Str_

Var_dump () void Var_dump (mixed expression [, mixed expression [, ...]]) The Var_dump () method is to determine the type and length of a variable and output the value of the variable if the variable has a value that is the value of the variable

Hey, this is the only problem left !!! 7. compile a program using a custom function to calculate the running time of the page script. Please use the PHP language !!! Reply to discussion (solution) Custom write? Functions are available. function

Objective The following is the implementation of the classic algorithm through PHP, and calculate the time-consuming, can be time-consuming comparison of the complexity of these algorithms. Insert Sort Bubble sort Select sort and

Str_replace can find replacement regular characters,Preg_replace to find replacement carriage return newline characters (\ r \ n)Preg_replace is commonly used in The code is as follows Copy Code getdescription)))?> ">

In general, if We cache the array into a file, we need to convert it into a string first, and then store it in a text file. Generally, there are two mechanisms to convert the array into a string, the first is $ strvar_export ($ arr, true); the

In general, if we cache the array into a file, we need to convert it into a string first, and then store it in a text file. Generally, there are two mechanisms to convert the array into a string, In general, if we cache the array into a file, we

7, the use of custom functions to write programs to calculate the running time of the page script. Please use PHP language!!! Reply to discussion (solution) Custom write? There's a function available, a blind toss. function speed () { static

This function has been used for obtaining:Copy codeThe Code is as follows:Function microtime_float (){List ($ usec, $ sec) = explode ("", microtime ());Return (float) $ usec + (float) $ sec );} We can see that microtime (true) is used in other

This function has been used for obtaining: CopyCode The Code is as follows: function microtime_float (){ List ($ USEC, $ Sec) = explode ("", microtime ()); Return (float) $ USEC + (float) $ Sec ); } We can see that microtime (true) is used in

Phpmicrotime gets the floating point timestamp. This function has been used for obtaining: Copy the code as follows: functionmicrotime_float () {list ($ usec, $ sec) explode (, microtime (); return (float) $ usec + (float) $ sec);} you can see that

Detailed description of var_dump () function in php. This article provides a comprehensive introduction to the usage of var_dump () functions in php. For more information, see. Var_dump () voidvar_dump (mixedexpression [, mixedexpression [,...])