Summary of PHP knowledge points

PHP Knowledge Points Summary

? 1.? Directory_separator

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?? ? ? Because the delimiter on window is "\" and the delimiter on Linux is "/"? Use this symbol to avoid this problem.

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? 2.? Realpath

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?? ?? returns the absolute path where the file resides.

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? 3. 0==null is established in PHP. ?

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? 4.file_get_contents and File differences

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?? ???? file_get_contents returns the contents of the file as a string

?? ???? to read the contents of a file into an array in rows, one line in the array.

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Count (File ("test.txt"))//number of rows to get the file

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? 5. PHP Delete folder (if there is a folder is not empty for the first time run this file may be error, the second time can be)

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function Deletedir ($dir) {    if (rmdir ($dir) ==false&&is_dir ($dir)) {          if ($filehandler =opendir ($dir)) { While                 (($file =readdir ($filehandler))!=false) {                       if ($file! = ".") && $file! = "...") {                              $fullpath = $dir. " /". $file;                             if (Is_dir ($fullpath)) {                                     deletedir ($fullpath);                             } else{                                     unlink ($fullpath);                 }} Closedir ($filehandler);          } else{                echo "Permision Deny";}}     

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6. Json_encode and Json_decode

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?? ????? Json_encode ()? :? Convert a PHP object to a JSON-formatted string

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?? ????? Json_decode ($str, $boolean)?: Converts a JSON-formatted string into a PHP object and returns an array if $boolean is true. Note that the format of the $str must be correct, key must have double quotation marks, otherwise the conversion failed.

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? 7. The PHP string connection uses the. = symbol, not the + = symbol.

? 8. ? __file__ Gets the absolute address of the current file.

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? 9. ? first Open the php.ini, the zend_extension = "D:\develop\xampp\php\ext\php_xdebug.dll" open, while the [Xdebug] setting open phase????? Xdebug.remote_enable = on to open, otherwise it cannot be debugged. The Xdebug settings for php.ini are as follows:,

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Xdebug.remote_enable=1xdebug.remote_autostart=1xdebug.remote_mode=reqxdebug.remote_host=localhostxdebug.remote _port=9000xdebug.idekey=phpstorm1

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?? Set up, start Phpstorm, we use the Open Directory feature, where the directory is preferably a directory under the Xampp Htdocs, so that we can debug the program in real time. Next we want to open the Settings panel, and then choose PHP, set the correct PHP home path, here can be PHP-related unit testing and so on.

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?? Note that the XAMPP installation can not have spaces, not recognized.

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? 10. ? PHP Send Message subject garbled solution

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$subject = Iconv ("", "UTF-8", "Gaea"); $subject = "=? UTF-8? B? ". Base64_encode ($subject). "? ="; Converted into base64

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