* @return void*/if( ! function_exists('is_really_writable')) { function is_really_writable($file){//If we're on a Unix server with safe_mode off we call is_writableif(DIRECTORY_SEPARATOR == "/"; AND @ini_get("safe_mode") ==FALSE){returnis_writable($file); }//For windows se...
1. 使用array_key_exists()函数: array_key_exists()函数接受两个参数,第一个参数是要检查的参数,第二个参数是要检查的数组。如果参数存在于数组中,函数会返回true,否则返回false。 下面是使用array_key_exists()函数的示例代码: “`php $parameter = ‘value’; $array = array(‘parameter’ => ‘value’...
If a save is already running, this command will fail and return FALSE. Example $redis->save(); slaveOf Description: Changes the slave status Parameters Either host (string) and port (int), or no parameter to stop being a slave. Return value BOOL: TRUE in case of success, FALSE in ...
Function [ <internal:json> function json_encode ] { - Parameters [2] { Parameter #0 [ <required> $value ] Parameter #1 [ <optional> $options ] } } Function [ <internal:json> function json_decode ] { - Parameters [3] { Parameter #0 [ <required> $json ] Parameter #1 [ <optional...
a 函数说明 abs 绝对值 acos 反余弦 acosh 反双曲余弦 addcslashes 以 C 语言风格使用反斜线转义字符串中的字符 addslashes 使用反斜线引用字符串 apache_child_terminate 在本次请求结束后终止 apache 子进程 apache_geten
Note:The result of this function is cached. Useclearstatcache()to clear the cache. Syntax file_exists(path) Parameter Values ParameterDescription pathRequired. Specifies the path to the file or directory to check Technical Details Return Value:TRUE if the file or directory exists, FALSE on failure...
{$argc} given",E_USER_WARNING);returnnull;}if(!is_array($params[0])){trigger_error('array_column() expects parameter 1 to be array, '.gettype($params[0]).' given',E_USER_WARNING);returnnull;}if(!is_int($params[1])&&!is_float($params[1])&&!is_string($params[1])&&$param...
The first, last, and contains collection methods all pass the "value" as the first parameter to their given callback Closure. For example:$collection->first(function ($value, $key) { return ! is_null($value); });In previous versions of Laravel, the $key was passed first. Since most ...
public static function autoLoad($class) { //如果有的话,去除类最左侧的\ $class = ltrim($class, '\'); //获取类的路径全名 $class_path = str_replace('\\', '/', $class) . EXT; if (file_exists(SYS_PATH . $class_path)) { ...
Check if a property exists useActivityPhp\Type;$note= Type::create('Note');echo$note->has('id');// trueecho$note->has('anotherProperty');// false Use native types All core and extended types are used with a classic instanciation. ...