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Editorial Team
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Asked: 2026-05-27T22:29:17+00:00

$a = ’86’; var_dump($a); //ouput string(2) 86 var_dump($a[‘wtf’]); //output string(1) 8 The second oputput

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$a = '86';
var_dump($a); //ouput string(2) "86"
var_dump($a['wtf']); //output string(1) "8"

The second oputput is strange although that is equivalent to 

var_dump($a[0]); ////output string(1) "8"

Can somebody explain me why var_dump($a[‘wtf’]); output string(1) “8” ?

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1 Answer

  1. Editorial Team

    $a is a string.
    A string in php can be regarded as an array of chars (so $a[0] == ‘8’ and $a[1] == ‘6’)
    Now, you tried to access the string at place [‘wtf’], since PHP expects a number there, it will try to convert ‘wtf’ to number. Since there is no digit in this string, it is regarded as 0.

    ‘wtf1’ is converted to 0 as it checks the first characters (thanks to sad bube)
    ‘1wtf’ is converted to 1
    ‘100’ is converted to 100
    ‘dfsdgrgergregr’ is converted to 0

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