可以使零为真吗？

Question

I have a string:

$string = '0';

And in an echo statement like this:

echo ($string ? 'true':'false');

I want the '0' to be true . It currently is false .

Is there a way to adjust the echo statement ? I know I can for example add a space in the string:

$string = ' 0';

And it will be true . But I am hoping for a solution that doesn't require me adjusting the string.

Answer 1

Is there a way to adjust the echo statement?

No - not without editing PHP's source code and rebuilding it yourself. The echo statement in PHP has 20-year-old well-documented behaviour - it would be foolish to make your PHP environment incompatible with the rest of the PHP ecosystem just to save yourself a few keystrokes.

A better idea is just to add your own global function:

<?php

function zeroToBoolText( $str ) {
    if( !is_string( $str ) ) die( "Argument is not a string." );
    if( $str === '0' ) {
        return 'true';
    }
    else {
        return ( $str ? 'true' : 'false' );
    }
}

?>

Used like so:

$string = '0';

echo zeroToBoolText( $string );

Answer 2

Using the below condition you can change if string is 0 true..

    if($string === '0')
    {
        $string = true;
    }
    else
    {
        $string = false;
    }

Try it, i think you need this one thank you..