Question

How to check whether a variable is a number or a numeric string in PHP

Answer 1

$n = "123";
   
if (is_numeric($n))   
    echo "yes";
else
    echo "no";

/*
run: 

yes 

*/

 

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Answer 2

$n = 6354;
   
if (is_numeric($n))   
    echo "yes";
else
    echo "no";

/*
run: 

yes 

*/

 

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Answer 3

$n = "63ab";
   
if (is_numeric($n))   
    echo "yes";
else
    echo "no";

/*
run: 

no 

*/

 

70+ SQL courses for beginners and professionals