Php String Lowercase

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PHP string functions and usage analysis

AddSlashes: String added to the slash. bin2hex: binary into hexadecimal. Chop: Remove continuous blanks. Chr: returns the ordinal value of the character. chunk_split: The string is divided into small pieces. convert_cyr_string: Converts the ancient Slavonic string into another string. crypt: Encrypt the string with DES encoding. echo: output string. explode: cut the string. flush: clear the output buffer. ...

Generate a random string, including uppercase, lowercase, numeric php code

Generate a random string, including uppercase and lowercase letters and numbers. Function randstr ($ length) {$ hash = ''; $ chars = 'abcdefghijklmnopqrstuvwxyz0123456789abcdefghijklmnopqrstuvwxyz'; $ max = strlen ($ chars) - 1; mt _...

PHP operation MySQL 3rd pass the third day

In this lesson, we want to learn how to increase the intelligent processing capacity of the Web page. Basic functions Welcome to the third and final lesson of this tutorial. If you've learned the first and second lessons, you've mastered the basics of installing and programming MySQL and PHP. Here are some of the other functions of PHP that might be useful to you and make your development process simpler.   First, let's look at the document. You should know some basic concepts of the header file, right? The header file is an external file whose contents are included in the main program. ...

53 points to improve the efficiency of PHP programming

It would be faster to enclose the string in single quotes instead of double quotes. Because PHP searches for variables in double-quoted strings, single quotes do not. Note that only echo can do this: it's a "function" that takes multiple strings as arguments, Echo is a language structure, not a real function, so the function with double quotes). 1, if you can define the class method as static, as far as the definition of static, it will speed up nearly 4 times. 2, $ row ['id'] speed ...

String function Library: sprintf

sprintf (PHP3, PHP4) sprintf---&http://www.aliyun.com/zixun/aggregation/37954.html ">nbsp; Returns the formatted string syntax: String sprintf (string format [, mixed args ...]) Description: Returns a string according to format string. Lattice ...

String function Library: Strtolower

Strtolower (PHP3, PHP4) strtolower---&http://www.aliyun.com/zixun/aggregation/37954.html ">nbsp; To convert a string to lowercase syntax: string strtolower (String str) Description: Returns the string after all alphabetic characters in Str are converted to lowercase. Note: The alphabetic character is from the current ...

PHP generates CAPTCHA pictures from getting started and proficient in tutorials

In PHP to generate a CAPTCHA image is quite simple, because in PHP for us to provide a graphics Gd.dll library, to enable the GD graphics library we just php.ini in the PHP-GD front; Method a $authnum = '; $ychar = "0,1,2,3,4,5,6,7,8,9,a,b,c,d,e,f,g,h,i,j,k,l,m,n,o,p,q,r,s,t,u,v,w,x,y,z&qu ...

PHP development can not be contrary to the safety rules

As PHP programmers, especially novices, always know too little about the dangers of the Internet, for many of the external invasion are at a loss what to do, they do not know how hackers invaded, submitted to the invasion, upload vulnerabilities, sql Injection, cross-scripting and more. As a basic precaution you need to be aware of your external commits and do a good job with the first side of the security mechanism to handle the firewall. Rule 1: Never trust external data or enter information about Web application security, the first thing you must recognize is that you should not trust external data. External data (outside d ...

PHP options and Information function library: Php_sapi_name

Php_sapi_http://www.aliyun.com/zixun/aggregation/11696.html ">name (PHP4 >= 4.0.1) php_sapi_name--- Returns the interface syntax between Web servo and PHP: String php_sapi_name (void) Description: Php_sapi_name () returns a lowercase ...

String function Library: get_meta_tags

Get_meta_tags (PHP3 >= 3.0.4, PHP4) get_meta_tags---&http://www.aliyun.com/zixun/aggregation/37954.html "> nbsp; Remove all meta tag content attributes from the file and return the array Syntax: get_meta_tags (string filename [, ...).

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