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POphp syntax for if statement with multiple conditions ( `||` as well as `&&` )
 

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  1. POphp syntax for if statement with multiple conditions ( `||` as well as `&&` )
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    <p>Context: On our website, we calculate whether an item/order meets the criteria for free shipping using an if statement evaluating if a value - 'ff' - is true. Depending on conditions met it sets the shipping appropriately. We now require the need to evaluate if an item is free shipping with the order of <em>_</em>. To top it off, for other purposes such as external feeds, another condition must apply (weight must = 0 or have no value), for fw to be free freight. Here is the code, that I can't figure out why it is NOT working:</p> <pre><code>if($r['freeFreight'] == 'ff' || ($r['freeFreight'] == 'fw' &amp;&amp; ($r['weight'] == 0 || $r['weight'] == '') ) ) { $r['shippingStandard'] = 0; } </code></pre> <p>Are the conditions overly segregated in the if statement with the sets of ()? Or, are they just incorrectly placed. For example, should it be:</p> <pre><code>if(($r['freeFreight'] == 'ff') || ($r['freeFreight'] == 'fw' &amp;&amp; $r['weight'] == 0 || $r['weight'] == '') ) { $r['shippingStandard'] = 0; } </code></pre> <p>The second of the two seems more logical to me because: if ($r['freeFreight'] == 'ff') - then regardless of the following conditions the statement should return true and set the variable to 0. Is my logic correct? Sorry for this newb question...</p> <p>Thanks for any help you can offer.</p> <hr> <p>So I think perhaps, based on the answers so far (thanks everybody that has chimed in to help an amateur) - I think I am going to do a trial with:</p> <pre><code>if( ($r['freeFreight'] == 'ff') || ( $r['freeFreight'] == 'fw' ) &amp;&amp; empty( $r['weight'] ) ) { $r['shippingStandard'] = 0; } </code></pre> <p>Planning to run trial with this, if it is fundamentally wrong, please advise.</p>
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    1. USJames Lee
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    1. COAre you checking `isset($r['weight'])` ?
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      1. USklugerama
    2. COI'm not.. smh - so would it than be if(($r['freeFreight'] == 'ff') || (isset($r['weight'] && $r['freeFreight'] == 'fw' && $r['weight'] == 0 || $r['weight'] == '') ) { $r['shippingStandard'] = 0; }
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      1. USJames Lee
    3. CO`emtpy` would be cleaner than doing all those checks
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      1. USAscherer
 

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