PHP empty() function. You can use the strict equality operator (===) to check whether a string is empty or not. It is very useful. empty() From PHP Manual – empty():. String myStr1 = "Jack Sparrow"; String myStr2 = ""; 2 Replies to “ Flow Condition – check string is empty ” Dan Sanders says: August 11, 2020 at 4:54 am Thanks Anita, very handy . 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: Name * 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. The PHP empty() function used to check whether the string is empty or not. However, there is a bit of caveat that you should be aware of. I will explain further in the later part of this tutorial, first syntax and live examples of using the empty function. Your email address will not be published. I want to check if the entire string is ONLY white space… But the only difference is !empty() function will not generate any warning or e-notice when the variable does not exists. 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. Particularly, in regards to user-submitted string … Dinesh says: November 4, 2020 at 11:12 am Thanks Anita. empty — Determine whether a variable is empty. First, it checks to see if the variable exists. When use ==, as you did, PHP treats NULL, false, 0, the empty string, and empty arrays as equal. Here is a simple way to do a check that will work:
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