PHP check if url parameter exists

Question

I have a URL which i pass parameters into     example success php id link1   I use php to grab it   slide      GET  id       then an if statement to display content based on parameter   lt  php  if  slide     link1       gt       content      gt    Just need to know in PHP how to say  if the url param exists grab it and do the if function  if it doesn t exist do nothing   Thanks Guys

User · Answer

if isset   GET  id              Do something     You want something like that

User · Answer

Why not just simplify it to if   GET  id     It will return true or false depending on status of the parameter s existence

User · Answer

I know this is an old question  but since php7 0 you can use the null coalescing operator  another resource    It similar to the ternary operator  but will behave like isset on the lefthand operand instead of just using its boolean value    slide     GET  quot id quot       fallback    So if   GET  quot id quot   is set  it returns the value  If not  it returns the fallback  I found this very helpful for   POST    GET  or any passed parameters  etc  slide     GET  quot id quot           if  trim  slide      link1

User · Answer

Here is the PHP code to check if  id  parameter exists in the URL or not   if isset   GET  id           slide     GET  id      Getting parameter value inside PHP variable     I hope it will help you

User · Answer

It is not quite clear what function you are talking about and if you need 2 separate branches or one  Assuming one   Change your first line to   slide       if  isset   GET  id            slide     GET  id

User · Answer

Use isset     matchFound    isset   GET  id     amp  amp  trim   GET  id        link1     slide    matchFound   trim   GET  id            EDIT  This is added for the completeness sake    GET in php is a reserved variable that is an associative array  Hence  you could also make use of  array key exists mixed  key  array  array    It will return a boolean that the key is found or not  So  the following also will be okay    matchFound    array key exists  id     GET    amp  amp  trim   GET  id        link1     slide    matchFound   trim   GET  id

[php] PHP check if url parameter exists

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