CI framework source code reading --------- system constant File constants. php

Configure system constants 1. when the file system is working, check and configure these preferences. when the file system is running, these default values will properly increase the security of the system, however, when the underlying layer of php or apache independently opens a process for each user, the octal value is always correct... "/> <scripttype =" text/javascript "src =" http: // www. configure system constants 1. when the file system is working, check and configure these preferences. when the file system is running, these default values will properly increase the security of the system, however, when the underlying layer of php or apache separately opens a process for each user, the value of "8 bytes" is always the correct FILE_READ_MODE for reading files. FILE_WRITE_MODE for writing files. DIR_READ_MODE for reading directories. DIR_WRITE_MODE for writing to directories. 2. file stream mode when fopen () is used () /in popen (), define ('fopen _ read', 'RB'); define ('fopen _ READ_WRITE ', 'R + B '); define ('fopen _ WRITE_CREATE_DESTRUCTIVE ', 'wb'); define ('fopen _ READ_WRITE_CREATE_DESTRUCTIVE', 'W + B '); define ('fopen _ WRITE_CREATE ', 'AB'); define ('fopen _ READ_WRITE_CREATE ', 'A + B'); define ('fopen _ WRITE_CREATE_STRICT ', 'xb '); define ('fopen _ READ_WRITE_CREATE_STRICT ', 'x + B'); file source code: [php]