It will return True if the given variable is empty and false if it exists or a non-zero or more than zero characters etc. Name * However, there is a bit of caveat that you should be aware of. Possible Duplicate: If string only contains spaces? Your email address will not be published. It is enough to use either of the function. As noted earlier, is_string() returns false on an object that has a __toString() method. I do not want to change a string nor do I want to check if it contains white space. 2 Replies to “ Flow Condition – check string is empty ” Dan Sanders says: August 11, 2020 at 4:54 am Thanks Anita, very handy . Reason to check both function: The isset() and !empty() functions are similar and both will return the same results. To check whether a given string is empty or not, we can use the built-in empty() function in PHP language. The comparsion str === "" will only return true if the data type of the value is string and it is not empty, otherwise return false as demonstrated in the following example: Leave a Reply Cancel reply. To add to @BJorn and @SeanPatrickFloyd The Guava way to do this is: Strings.nullToEmpty(str).isEmpty(); // or Strings.isNullOrEmpty(str); Commons Lang is more readable at times but I have been slowly relying more on Guava plus sometimes Commons Lang is confusing when it comes to isBlank() (as in what is whitespace or not).. Guava’s version of Commons Lang isBlank … The PHP function empty is often used to check if a particular variable is empty or not (duh). PHP empty() function. It is very useful. First, it checks to see if the variable exists. The PHP empty() function used to check whether the string is empty or not. share | improve this answer | follow | edited Dec 11 '19 at 23:39 Note that checking the existence of a subkey of an array when that subkey does not exist but the parent does and is a string will return false for empty. In other words, it will return true if the variable is an empty string, false, array(), NULL, “0?, 0, and an unset variable. empty — Determine whether a variable is empty. Dinesh says: November 4, 2020 at 11:12 am Thanks Anita. Particularly, in regards to user-submitted string … The empty() function returns true if a string is empty… In PHP the empty() function return true if the variable has empty or zero value and it return false if string has non-empty or non-zero value. Required fields are marked * Comment. The PHP empty function is used to determine if a variable is empty or not. If it does exist, then it checks to see if the variable is a “falsey” value. String myStr1 = "Jack Sparrow"; String myStr2 = ""; I want to check if the entire string is ONLY white space… Let’s say we have the following strings. Here is a simple way to do a check that will work:

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