PHP code optimization and PHP related issues summary

1, in the function, when passing the array Using return is more efficient than using global Like what function Userloginfo ($usertemp) {$detail =explode ("|", $usertemp);return $detail;}$login =userloginfo ($USERDB); Than function Userloginfo

Problems and workarounds for dynamic GIF generation using PHP

PHP does not stipulate that only HTML files are output, it can generate animated GIF files. I encountered some problems when using PHP to dynamically generate GIF images, which I have now resolved, and I am using php4.05 (for Win32) +apache3.1.2_win3

Yii2.0 Integrated Elfinder Image Manager call method

YII2 Extension: Https://github.com/MihailDev/yii2-elfinder Although the tutorial is Russian, don't be afraid, just follow the code. Steps: 1. Install the extension with composer Composer require--prefer-dist mihaildev/yii2-elfinder "*" 2, add

PHP template Smarty

PHP template technology should be often mentioned, like the more famous Phplib Fasttemplate, have basically implemented the MVC pattern, the work is not abrasive, now with the 2 template is not much, because there is another template class Smarty,

How Beginners learn PHP framework

PHP has become the most popular scripting language for many reasons: flexibility, ease of use, and so on. We usually need a PHP framework instead of the programmer to do the repetitive parts. What is the PHP framework? The PHP Framework provides a

PHP generate UTF-8 encoded CSV file with Excel open garbled solution

Cause: There is no BOM in the output CSV file. What is a BOM? There is a character called "ZERO WIDTH no-break SPACE" in the UCS encoding, and its encoding is Feff. Fffe is not a character in UCS, so it should not appear in the actual

Code in PHP that calculates an unknown length of string which character appears most frequently

The function to use: Str_split: Splits a string into an array. A similar function explode () function splits a string into arrays. Array_count_values: Used to count the occurrences of all values in the array. Arsort: Reverses the array and maintains

Product Specification Development process

Development preparation Understanding Products and Designs Participate in requirements, interactions, and visual meetings to understand product design and project members. Learn about the devices and platforms your product faces. Understand the

Convert integers to unique strings through Hashids in PHP

Need to hide the ID in the foreground, you can consider using this product, the generated ID is relatively tall, compared to such as Youtube, Youku, Weibo, such as the ID name, such as: Xnjkxmtc0mdq4 Official website: http://hashids.org/php/Laravel 5

Multiple ways to share PHP generated static files

The first type: Generate static PHP dynamic page content Copy the code code as follows: Ob_start (); #开启服务器缓存 Include_once ' index.php '; $ctx =ob_get_contents (); #获取缓存 Ob_end_clean (); #清空缓存 $FH =fopen ("index.html", "w+"); Fwrite ($FH, $ctx);

Use the object as an array in PHP

We understand that in JavaScript, the properties and methods of an object can be accessed using the pattern of an array. But it's usually impossible. Why do you do this? This is because, in this way, it is easier to manipulate objects, and we can

PHP date to timestamp, specified date converted to timestamp

Programmers who have written php+mysql know that there is a time lag, Unix timestamps and formatted dates are two time representations that we often deal with, Unix timestamp storage, easy processing, but not intuitive, formatted date intuitive, but

PHP anti-XSS anti-SQL injection code

function Gjj ($str) { $farr = array ( "/\\s+/", "/]*?) >/isu ", "/(]*) on[a-za-z]+\s*= ([^>]*>)/isu ", ); $str = Preg_replace ($farr, "", $str); Return addslashes ($STR);} function Hg_input_bb ($array) { if

PHP Scheduled task detects user connection status

Scheduled Tasks Copy the code code as follows: Ignore_user_abort (); User Close Browser program still executes Set_time_limit (0); No limit on program run time $interval = 3; Program Cycle time interval seconds $link = mysql_connect (' localhost ',

Introduction to PHP Page cache OB series functions

The main use of the PHP page cache is the OB series functions, such as Ob_start (), Ob_end_flush (), ob_get_contents () Here is the coding section. 1. Initialization function, usually set the page cache path, cache file naming format, etc., can be

PHP analog JS function unescape function code

Copy the code code as follows: function Unescape ($str) {$ret = '; $len = strlen ($STR); for ($i = 0; $i >6). Chr (0x80| ( $val &0x3f)); else $ret. = Chr (0xe0| ( $val >>12). Chr (0x80| ( ($val >>6) &0x3f). Chr (0x80| ( $val &0x3f)); $i + = 5;

A few useful PHP string filters, conversion function code

NL2BR ();/\ n to Addslashes (); Stripslashes ();//Escape special characters when working on a database Chop ();//Remove the right space of the string Trim ();//Remove all spaces in the string LTrim ();//Remove the left space of the string

PHP images and Chinese watermark for code sharing

Example 1 Copy the code code as follows: Header ("Content-type:image/png"); /* Notify browser, to output image */ $im = Imagecreate (400, 300); /* Define the size of the image */ $gray = Imagecolorallocate ($im, 235, 235, 235); $pink =

Eval () function tips in PHP

Eval Converts a value into a string. Syntax: void eval (string code_str); return value: None Function type: Data processing Content Description This function can substitute the value of a variable in a string, and is typically used to manipulate

Converts an XML file into an array

' $parent [$level-1] = & $current; if (!is_array ($current) or (!in_array ($tag, Array_keys ($current))) {//insert New tag $current [$tag] = $result; if ($attributes _data) $current [$tag. ' _attr '] =

Total Pages: 5208 1 .... 1971 1972 1973 1974 1975 .... 5208 Go to: GO

Contact Us

The content source of this page is from Internet, which doesn't represent Alibaba Cloud's opinion; products and services mentioned on that page don't have any relationship with Alibaba Cloud. If the content of the page makes you feel confusing, please write us an email, we will handle the problem within 5 days after receiving your email.

If you find any instances of plagiarism from the community, please send an email to: info-contact@alibabacloud.com and provide relevant evidence. A staff member will contact you within 5 working days.

A Free Trial That Lets You Build Big!

Start building with 50+ products and up to 12 months usage for Elastic Compute Service

  • Sales Support

    1 on 1 presale consultation

  • After-Sales Support

    24/7 Technical Support 6 Free Tickets per Quarter Faster Response

  • Alibaba Cloud offers highly flexible support services tailored to meet your exact needs.