empty check

empty-Check if a variable is empty Statement a bug description BOOL Empty (mixed $var) Empty () returns FALSE if Var is a non-null or Non-zero value. In other words, "", 0, "0", NULL, FALSE, Array (), Var $var; and objects that do not have any

Empty-check whether a variable is empty Report a bug description Bool empty (mixed $ var)If var is a non-null or non-zero value, empty () returns FALSE. In other words, "", 0, "0", NULL, FALSE, array (), var $ var; and objects without any

Phpempty () checks whether a variable is empty. Empty-check whether a variable is null Reportabug description boolempty (mixed $ var) if var is not null or a non-zero value, empty () returns FALSE. In other words, 0, 0, Empty-check whether a

empty-checks if a variable is empty Report a bug description BOOL Empty (mixed $var) If Var is a non-null or nonzero value, empty () returns FALSE. In other words, "", 0, "0", NULL, FALSE, Array (), Var $var; and objects that do not have any

/** * Determine whether the given object is an array: * Either an object array or a primitive array. @param obj the object to check */ Public Static Boolean IsArray (Object obj) { returnnull && obj.getclass (). IsArray (

Check whether the empty line ETL processing in kettle data streams sometimes requires data generation but no data input. This may cause some problems. Therefore, the ETL data stream is usually required to generate a blank line of data; sometimes

PHPisset () and empty () usage differences. The isset () function of PHP is generally used to check whether the variable is set in the format boolisset (mixedvar [, mixedvar [,...]). function: checks whether a return value is set for a variable. if

Zookeeper Check for empty rows in the kettle data stream   During ETL processing, sometimes data needs to be generated but data is not input, which may cause some problems. Therefore, ETL data streams are usually required to generate an empty row of

http://techibee.com/powershell/check-if-a-string-is-null-or-empty-using-powershell/1889Check If a string is NULL or EMPTY using PowerShellby Techibee on October 10, 2012In this post, I'll show you what to verify if a string is empty, null or have

Through learning the PHP language, you should know that it is a function-based HTML scripting language. The huge function library supports the implementation of PHP functions. Next we will introduce the usage of PHP functions isset () and empty. The