PHP Best way to check if input is a valid number

Question

What is the best way of checking if input is numeric    1-  111  5xf 0xf   Those kind of numbers should not be valid  Only numbers like  123  012  12   positive numbers should be valid  This is mye current code    num    int   val  if       preg match     d       num       amp  amp      strval intval  num      strval  num              return true    else       return false

User · Accepted Answer

ctype digit was built precisely for this purpose

User · Answer

The most secure way   if preg replace      -  0 1  0-9      0-9    0 1          value              if all made of numbers  -  or      then yes is number

User · Answer

filter var     options   array       options    gt  array  min range    gt  0      if  filter var  int  FILTER VALIDATE INT   options      FALSE        you re good

User · Answer

return ctype digit  num   amp  amp   int   num  gt  0

User · Answer

I use  if is numeric  value   amp  amp   value  gt  0  amp  amp   value    round  value  0      to validate if a value is numeric  positive and integral  http   php net is numeric  I don t really like ctype digit as its not as readable as  is numeric  and actually has less flaws when you really want to validate that a value is numeric

User · Answer

For PHP version 4 or later versions    lt  PHP  input   4  if is numeric  input        return   TRUE   if it is numeric     echo  The input is numeric    else      echo  The input is not numeric       gt

[php] PHP: Best way to check if input is a valid number?

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