php not empty



back to the original question, " if variable is not empty, echo some html code." "i would like to display some html code if a variable is not empty, else i would like to display nothing." easy way: <?php if (!empty($var)) echo "some html code here"; ?> if your variable is not empty "some html code here" will  $tmp = $registry>notempty; var_dump(empty($tmp)); false as expected ?> the result for empty($registry>notempty) is a bit unexpeced as the value is obviously set and nonempty. this is due to the fact that the empty() function uses __isset() magic functin in these cases. although it's noted in the documentation above,  php has different functions which can be used to test the value of a variable. three useful functions for this are isset(), empty() and is_null(). all these function return a boolean value. if these functions are not used in correct way they can cause unexpected results. isset() and empty() are often viewed as 

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if you're testing for an empty string in php you could be forgiven for using the empty() function. however, exercise caution as empty() may not do what you think it does. php treats and '′ as empty. take the following: $var = ''; if(empty($var)) { echo 'true'; } else { echo 'false'; }. the above will echo true  the empty() function is used to check whether a variable is empty or not. do use empty() with arrays. php's empty() is very useful for dealing with php arrays since it returns true if your array variable is null or an empty array, and also gracefully returns true if your array variable is undefined. if (!empty($myarray)) { this code runs if $myarray is defined, not null, and not an empty 

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one of the most confusing things for new programmers (and it even trips me up sometimes) is how to test for boolean conditions in code. as developers, we want to develop code that never emits notices or warnings, and php gets a bit antsy when we develop code that utilizes uninitialized variables. i'm a complete php noob and i'm trying to write a sentence but am not getting far. here's what i need. i have a $variable that may or may not contain data. if it does, i want to echo a large block of html & php. if the $variable is empty, i just want a blank space. can someone whip up some code that i can try  there are a few ways to check if an array is empty. the most common i've seen in my experience is > if ( == count($array)) i, however like using a more simple approach like this: > if (!$array) there are other ways to find if an array is empty, l github is where people build software. more than million people use github to discover, fork, and contribute to over million projects.

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