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How to determine whether two strings are equal in php

How to determine whether two strings are equal in PHP: 1. Use the "==" operator, which will work normally in most cases; 2. Use the "===" operator, which will not only compare strings values, and their types will also be compared; 3. Use the strcasecmp() function, which will ignore case to compare two strings; 4. Use the strcmp() function, this function will compare two strings with case sensitivity .

Jul 11, 2023 pm 04:54 PM

php

How to convert time into characters in php

How to convert time into characters in PHP: 1. Use the date() function to convert the timestamp into a string according to the specified format; 2. Use the strftime() function to convert the timestamp into a localized string.

Jul 11, 2023 pm 04:43 PM

php

Why is php inserted into the database garbled?

The reasons why PHP inserts garbled characters into the database: 1. The database character set configuration is incorrect. Change the character set of the table database to be consistent with the character set used by the application; 2. The character encoding setting is incorrect when PHP connects to the database. You can use "mysqli_set_charset( )" function sets the character encoding of the database connection; 3. The character encoding problem of the PHP file itself, ensure that the character encoding setting of the PHP file itself is correct; 4. The data submitted by the HTML form is incorrect; 5. The database field type does not match the inserted data type wait.

Jul 11, 2023 pm 04:40 PM

php数据库

How to implement 301 jump in php

How to implement 301 jump in PHP: 1. Use the header function to set the HTTP status code to 301; 2. Use the header function to set the Location header information and specify a new URL address; 3. Use the exit function to exit the current script, ensuring Subsequent code will not be executed; 4. When the user accesses the original URL, the server will return a 301 status code and redirect the user to the new URL.

Jul 11, 2023 pm 04:35 PM

php

How to convert date to days in php

How to convert date to number of days in php: 1. strtotime() function, use this function to convert the date to UNIX timestamp, use the "floor()" function to divide by the number of seconds per day to get the number of days of the date; 2. DateTime class , create a DateTime object, use the "diff()" method to compare the given date with the current date, and then use the "format()" method to get the number of days between dates; 3. Write a custom function to convert the date to the number of days, etc. wait.

Jul 11, 2023 pm 04:28 PM

php日期转换

How to use regular expressions in php to remove some fixed characters

PHP uses regular expressions to remove some fixed characters: 1. To remove spaces in the string, use "\s+" to match spaces and replace them with empty characters; 2. To remove special characters in the string, use "[@!] "Match the two special characters @ or ! and replace them with empty characters; 3. Remove the HTML tags in the string and use "<\/?[^>]+>" to match any HTML tags and replace them with empty characters Characters; 4. Remove non-numeric characters from the string, use "[^0-9]" to match any characters other than numbers, and replace them with empty characters.

Jul 11, 2023 pm 03:54 PM

phpPHP正则表达式

What are the php installation environments?

The PHP installation environment includes: 1. Ensure that your system meets the minimum system requirements of PHP; 2. Select the appropriate server software and ensure that it is installed and configured correctly; 3. Download the PHP interpreter suitable for the system version, and follow the official provision when installing Installation guide and select the appropriate configuration options; 4. According to the selected server software, it needs to be configured appropriately; 5. Use command line tools or manually install some PHP extension modules that provide additional functionality and characteristics.

Jul 11, 2023 pm 03:39 PM

php安装

How to check if the extension is loaded in php

How to check whether the extension is loaded in PHP: 1. Use the function "extension_loaded", which accepts a string parameter, which is the name of the extension to be checked; 2. Use the function "get_loaded_extensions", which returns a string containing all Array of loaded extension names; 3. Use the function "phpinfo", which generates a complete PHP information page including details about the loaded extensions.

Jul 11, 2023 pm 03:24 PM

php扩展

How to replace punctuation marks in text in php

How to replace punctuation marks in the text in PHP: 1. Use regular expressions and use the "preg_replace" function to replace the regular expression "/[[:punct:]]/" with an empty string to replace the punctuation marks in the text; 2. Use " "str_replace" function replaces all elements in the punctuation array with empty strings; 3. Use the strtr function to pass a replacement mapping array to the "strtr" function and perform string replacement.

Jul 11, 2023 pm 03:15 PM

php

What should I do if the Chinese characters on the php web page are displayed as garbled characters?

Steps to solve the garbled Chinese display of PHP web pages: 1. Make sure that the encoding of the PHP file is consistent with the web page encoding; 2. If the web page content comes from a database, you need to ensure that the database connection encoding is consistent with the web page encoding; 3. Add the following to the "head" tag of the web page code to set the webpage encoding; 4. If the database connection encoding and the webpage encoding cannot be consistent, you can use the "iconv()" or "mb_convert_encoding()" function to convert the content; 5. Check the database encoding.

Jul 11, 2023 pm 02:35 PM

php乱码

How to convert string to datetime in php

How to convert a string to datetime in PHP: 1. Define a string variable "$str" and a date and time format variable "$format"; 2. Use the "createFromFormat()" method of the "DateTime" class to convert the string to "DateTime" object; 3. If the conversion is successful, "Conversion Successful!" is output. If the conversion fails, "Conversion Failed!" is output.

Jul 11, 2023 pm 02:23 PM

php字符串

At least how many php-cgi.exe processes should be opened?

At least one php-cgi.exe process should be opened. This is because after the server receives a request, it needs to pass the request to the php-cgi.exe process for execution. The minimum number of processes depends on multiple factors. If the server configuration is sufficient High, for example, if you have multiple CPU cores and a large amount of memory, you can open more processes. Secondly, it also depends on factors such as the performance requirements of the application, the amount of concurrent access, and the execution time of the script.

Jul 11, 2023 pm 02:09 PM

phpphp-cgi

How to solve the error message prompted by php.ini

Solution to the error reported by php.ini: 1. Check the php.ini file carefully; 2. Use the appropriate PHP version; 3. Check the extension path and files; 4. Use debugging tools and commands; 5. Seek professional help.

Jul 11, 2023 pm 02:02 PM

php

How to convert month to English month in php

How to convert months to English months in PHP: 1. Use the "mktime()" function to create a timestamp, and pass the timestamp to the "date()" function, specify the English month as "F", and execute "echo" that is Yes; 2. Use the "setlocale()" function to set the localization setting to English, use the "mktime()" function to create a timestamp, and pass it to the "strftime()" function, specify the output format "%B", and execute Just "echo".

Jul 11, 2023 pm 01:51 PM

php月份