php if string contains a number code example

Example 1: check if includes numbers php

if (preg_match('~[0-9]+~', $string)) {
    echo 'string with numbers';
}

Example 2: check value contains numbers or letters php

is_numeric ( $var ) 
  returns : true or false

'42' is numeric
1337 is numeric
1337 is numeric
1337 is numeric
1337 is numeric
1337.0 is numeric
'0x539' is NOT numeric
'02471' is numeric
'0b10100111001' is NOT numeric
'1337e0' is numeric
'not numeric' is NOT numeric
array (
) is NOT numeric
9.1 is numeric
NULL is NOT numeric

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