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copied!<p>No, there is not, for starters, it is impossible to have an array with elements sharing the same key</p> <pre><code>$x =array(); $x['foo'] = 'bar' ; $x['foo'] = 'baz' ; #replaces 'bar' </code></pre> <p>Secondarily, if you wish to merely prefix the numbers so that </p> <pre><code>$x[0] --> $x['foo_0'] </code></pre> <p>That is computationally implausible to do without looping. No php functions presently exist for the task of "key-prefixing", and the closest thing is <a href="http://php.net/manual/en/function.extract.php" rel="nofollow noreferrer">"extract"</a> which will prefix numeric keys prior to making them variables. </p> <p>The very simplest way is this: </p> <pre><code>function rekey( $input , $prefix ) { $out = array(); foreach( $input as $i => $v ) { if ( is_numeric( $i ) ) { $out[$prefix . $i] = $v; continue; } $out[$i] = $v; } return $out; } </code></pre> <p>Additionally, upon reading XMLWriter usage, I believe you would be writing XML in a bad way. </p> <pre><code><section> <foo_0></foo_0> <foo_1></foo_1> <bar></bar> <foo_2></foo_2> </section> </code></pre> <p>Is not good XML. </p> <pre><code><section> <foo></foo> <foo></foo> <bar></bar> <foo></foo> </section> </code></pre> <p>Is better XML, because when intrepreted, the names being duplicate don't matter because they're all offset numerically like so: </p> <pre><code>section => { 0 => [ foo , {} ] 1 => [ foo , {} ] 2 => [ bar , {} ] 3 => [ foo , {} ] } </code></pre>

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