About thinkphp built-in functions detailed D, F, S, C, L, A, I

Single-letter functions D, F, S, C, L, A, I they are defined in the thinkphp core thinkphp/mode/api/functions.php this file.

Let me explain their functions separately:

D () Load model class

M () Load model class

A () Load action class

L () Get the language definition

C () Get configuration value usage is C ("Fill in the subscript of the array in the configuration file")

S () global cache configuration usage S ("Here is the equivalent of a unique identity")

F () Fast file data reading and saving for simple type data strings, arrays

I () Quickly create an object instance

Included here: thinkphp prototype definition of all functions built in

1 
 Php2 3 /** 4 * Think API mode function library5 */ 6 7 /** 8 * Get and set configuration parameters support Batch definition9 * @param string|array $name configuration VariablesTen * @param mixed $value configuration values One * @param mixed $default default value A * @return Mixed - */  - functionC$name=NULL,$value=NULL,$default=NULL) {}  the  - /**  - * Load profile support format conversion supports only one-level configuration - * @param string $file profile name + * @param string $parse Configuration parsing method Some formats require the user to parse themselves - * @return void + */  A functionLoad_config ($file,$parse=conf_parse) {}  at  - /**  - * Throw exception handling - * @param string $msg exception message - * @param integer $code exception code defaults to 0 - * @return void in */  - functionE$msg,$code=0) {}  to  + /**  - * Recording and statistical time (microseconds) and memory usage the * How to use: *  *   36  * G('begin'); // 记录开始标记位  37  * // ... 区间运行代码  38  * G('end'); // 记录结束标签位  39  * echo G('begin','end',6); // 统计区间运行时间 精确到小数后6位  40  * echo G('begin','end','m'); // 统计区间内存使用情况  41  * 如果end标记位没有定义，则会自动以当前作为标记位  42  * 其中统计内存使用需要 MEMORY_LIMIT_ON 常量为true才有效  43  *   - * @param string $start start tag $ * @param string $end end tag $ * @param integer|string $dec decimal digits or M - * @return Mixed - */  the functionG$start,$end='',$dec=4) {}  - Wuyi /**  the * Get and set Language definitions ( case insensitive) - * @param string|array $name language variables Wu * @param string $value language value - * @return Mixed About */  $ functionL$name=NULL,$value=NULL) {}  -  - /**  - * Add and Get page trace records A * @param string $value variable + * @param string $label tag the * @param string $level log level - * @param boolean $record Whether logs are logged $ * @return void the */  the functionTrace$value= ' [Think] ',$label='',$level= ' DEBUG ',$record=false) {}  the  the /**  - * Compiling files in * @param string $filename file name the * @return String the */  About functionCompile$filename) {}  the  the /**  the * Get input parameters to support filtering and default values + * How to use: -  *   80  * I('id',0); 获取id参数 自动判断get或者post  81  * I('post.name','','htmlspecialchars'); 获取$_POST['name']  82  * I('get.'); 获取$_GET  83  *   - * @param string $name The name of the variable supports the specified type - * @param The default value when the mixed $default does not exist the * @param mixed $filter parameter filtering method the * @return Mixed the */  the functionI ($name,$default='',$filter=NULL) {}  -  the /**  the * Set up and get statistical data the * How to use:94  *   95  * N('db',1); // 记录数据库操作次数  96  * N('read',1); // 记录读取次数  97  * echo N('db'); // 获取当前页面数据库的所有操作次数  98  * echo N('read'); // 获取当前页面读取次数  99  *   - * @param string $key identify the location101 * @param integer $step step value102 * @return Mixed103 */ 104 functionN$key,$step=0,$save=false) {}  the 106 /** 107 * String naming style conversion108 * Type 0 convert Java style to C style 1 convert c style to Java style109 * @param string $name strings the * @param integer $type conversion type111 * @return String the */ 113 functionParse_name ($name,$type=0) {}  the  the /**  the * Optimized require_once117 * @param string $filename file address118 * @return Boolean119 */  - functionRequire_cache ($filename) {} 121 122 /** 123 * Case-sensitive file existence judgment124 * @param string $filename file address the * @return Boolean126 */ 127 functionFile_exists_case ($filename) {}  - 129 /**  the * Import the required class library with Java Import This function has the cache function131 * @param string $class Class library namespace strings the * @param string $baseUrl start path133 * @param string $ext imported file name extensions134 * @return Boolean135 */ 136 functionImport$class,$BASEURL= '',$ext=EXT) {} 137 138 /** 139 * Import function library based on namespace method $ * Load (' @. Util.array ')141 * @param string $name function library namespace string142 * @param string $baseUrl start path143 * @param string $ext imported file name extensions144 * @return void145 */ 146 functionLoad$name,$BASEURL='',$ext= '. php ') {} 147 148 /** 149 * Fast import of third-party framework class library all third-party framework class library files are placed under the vendor directory of the system. Max * @param string $class class library151 * @param string $baseUrl Base directory the * @param string $ext class library suffix153 * @return Boolean154 */ 155 functionVendor$class,$BASEURL= '',$ext= '. php ') {} 156 157 /** 158 * The D function is used to instantiate the model class format [resource://][module/] Model159 * @param string $name resource address the * @param string $layer model layer name161 * @return Model162 */ 163 functionD$name='',$layer='') {} 164 165 /** 166 * The M function is used to instantiate a model without a modeling file167 * @param string $name model name supports specifying the underlying model such as Mongomodel:user168 * @param string $tablePrefix table prefix169 * @param mixed $connection database connection information the * @return Model171 */ 172 functionM$name='',$tablePrefix='',$connection='') {} 173 174 /** 175 * Parse the resource address and import the class library file176 * For example Module/controller addon://module/behavior177 * @param string $name resource address format: [Extension://][module/] Resource name178 * @param string $layer hierarchical name179 * @return String the */ 181 functionParse_res_name ($name,$layer,$level=1) {} 182 183 /** 184 * A function is used to instantiate the controller format: [Resource://][module/] Controller185 * @param string $name resource address186 * @param string $layer control layer name187 * @param integer $level controller hierarchy188 * @return Controller|false189 */  the functionA$name,$layer='',$level='') {} 191 192 /** 193 * Operation method of Remote Call Controller URL parameter format [resource://][module/] Controller/Operation194 * @param string $url call address195 * @param string|array $vars Call parameters support strings and Arrays196 * @param string $layer The name of the control layer to invoke197 * @return Mixed198 */ 199 functionR$url,$vars=Array(),$layer='') {}  $ 201 /** 202 * Perform an action203 * @param string $name behavior name204 * @param Mixed $params parameters passed in205 * @return void206 */ 207 functionB$name, &$params=NULL) {} 208 209 /**  About * Remove whitespace and comments from the code211 * @param string $content code content212 * @return String213 */ 214 functionStrip_whitespace ($content) {} 215 216 /** 217 * Browser-friendly variable output218 * @param mixed $var variables219 * @param boolean $echo whether the output defaults to True if False returns the output string - * @param string $label tag is empty by default221 * @param boolean $strict is strict by default true222 * @return void|string223 */ 224 functionDump$var,$echo=true,$label=NULL,$strict=true) {} 225 226 /** 227 * URL Redirection228 * @param string $url The URL address of the redirect229 * Wait time for @param integer $time redirect (seconds) the * @param string $msg prompt before redirection231 * @return void232 */ 233 functionredirect$url,$time=0,$msg='') {} 234 235 /** 236 * Cache Management237 * @param mixed $name cache name if the array represents cache settings238 * @param mixed $value cache value239 * @param mixed $options cache parameters - * @return Mixed241 */ 242 functionS$name,$value='',$options=NULL) {} 243 244 /** 245 * Fast file data reading and saving for simple type data strings, arrays246 * @param string $name cache name247 * @param mixed $value cache value248 * @param string $path cache path249 * @return Mixed - */ 251 functionF$name,$value='',$path=Data_path) {} 252 253 /** 254 * Generate unique identification numbers based on PHP various types of variables255 * @param mixed $mix variables the * @return String257 */ 258 functionTo_guid_string ($mix) {} 259 260 /** 261 * XML Encoding262 * @param mixed $data data263 * @param string $root root node name the * @param a sub-node name for a string $item numeric index265 * @param string $attr root node properties266 * @param string $id Numeric index child node key conversion property name267 * @param string $encoding data encoding268 * @return String269 */  the functionXml_encode ($data,$root= ' Think ',$item= ' Item ',$attr='',$id= ' id ',$encoding= ' Utf-8 ') {} 271 272 /** 273 * Data XML encoding274 * @param mixed $data data275 * Node name when @param string $item a numeric index276 * @param string $id Numeric index key to the property name277 * @return String278 */ 279 functionData_to_xml ($data,$item= ' Item ',$id= ' id ') {} 280 281 /** 282 * Session management function283 * @param string|array $name Session name if the array represents the session setting284 * @param mixed $value Session value285 * @return Mixed286 */ 287 functionSession$name,$value='') {} 288 /** 289 * Cookie settings, access, deletion290 * @param string $name cookie name291 * @param mixed $value cookie value292 * @param mixed $options cookie Parameters293 * @return Mixed294 */ 295 functionCookies ($name,$value='',$option=NULL) {} 296 297 /** 298 * Load dynamic Extension Files299 * @return void - */ 301 functionLoad_ext_file ($path) {} 302 /** 303 * Get client IP address304 * @param integer $type return type 0 return IP address 1 return IPV4 address number305 * @return Mixed306 */ 307 functionGET_CLIENT_IP ($type= 0) {} 308 309 /** 310 * Send HTTP status311 * @param integer $code status code312 * @return void313 */ 314 functionSend_http_status ($code) {} 315  the //filter expressions in a form 317 functionFilter_exp (&$value) {} 318 319 //Case -insensitive In_array implementations  the functionIn_array_case ($value,$array) {}

The above describes the thinkphp built-in functions in detail D, F, S, C, L, A, I, including the aspects of the content, I hope that the PHP tutorial interested in a friend helpful.

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