PHP - If variable is not empty echo some html code

Question

I would like to display some html code if a variable is not empty  else I would like to display nothing   I ve tried this code but doesn t work    lt  php       web   the field  website        if  isset  web       gt          lt span class  field-label  gt Website   lt  span gt  lt a href  http    lt  php the field  website      gt   target   blank  gt  lt  php the field  website      gt  lt  a gt    lt  php       else            echo  Niente           gt

User · Answer

if  empty  web        echo  Something

User · Answer

Your problem is in your use of the field    which is for Advanced Custom Fields  a wordpress plugin    If you want to use a field in a variable you have to use this   web   get field  website

User · Answer

isset will return true even if the variable is     isset returns false only if a variable is null  What you should be doing   if   empty  web            foo     This will check that he variable is not empty   Hope this helps

User · Answer

if   empty  web       gt       lt span class  field-label  gt Website    lt  span gt  lt a href  http    lt  php the field  website      gt   target   blank  gt  lt  php the field  website      gt  lt  a gt    lt  php   else   echo  Niente      http   us php net manual en function empty php

User · Answer

if  var         amp  amp   var     NULL       echo  var

User · Answer

i hope this will work too  try using is null    lt  php   web   the field  website    if   is null  web       gt       html code here   lt  php   else        echo  Niente       gt    http   php net manual en function is-null php  hope that suits you

User · Answer

You re using isset  what isset does is check if the variable is set   exists   and is not NULL  What you re looking for is empty  which checks if a variable is empty or not  even if it s set  To check what is empty and what is not take a look at   http   php net manual en function empty php  Also check http   php net manual en function isset php for what isset does exactly  so you understand why it doesn t do what you expect it to do

User · Answer

I don t see how if  empty  var   can create confusion  but I do agree that if   var  is simpler      vanneto Mar 8  12 at 13 33           Because empty has the specific purpose of suppressing errors for nonexistent variables  You don t want to suppress errors unless you need to  The Definitive Guide To PHP s isset And empty explains the problem in detail      deceze  Mar 9  12 at 1 24      Focusing on the error suppression part  if the variable is an array where a key being accessed may or may not be defined    if  web  status    would produce      Notice  Undefined index  status  To access that key without triggering errors     if isset  web  status     amp  amp   web  status     2nd condition is not tested if the 1st one is FALSE  OR if  empty  web  status         However  as deceze  pointed out  a truthy value of a defined variable makes  empty redundant  but you still need to remember that PHP assumes the following examples as FALSE    null    or    0 0  0  0  or  0   0    0    3   So if zero is a meaningful status that you want to detect  you should actually use string and numeric comparisons    Error free and zero detection   if isset  web  status        if  web  status        0      web  status       0          web  status       0 0     web  status             not empty  use the value     else          consider it as empty  since status may be FALSE  null or an empty string         The generic condition   web  status    should be left at the end of the entire statement

User · Answer

Simply use if   web   This is true if the variable has any truthy value   You don t need isset or empty since you know the variable exists  since you have just set it in the previous line

[php] PHP - If variable is not empty, echo some html code

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