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POStrange behavior while modifying array that is being iterated
 

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  1. POStrange behavior while modifying array that is being iterated
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    <p>This is a stupid example, but shows exactly what is my problem. In some situations the array is sucessufully modified and anothers it is not, why? Values are given to foreach by value? And the output is also screwed, some lines seems to have '\r\n' others do not. <pre><code>$arr = file('text.txt'); echo '&lt;pre&gt;'; foreach( $arr as $x =&gt; $line){ if( $x % 3){ unset( $arr[$x]); } // this works else{ $arr[$x+1] += 1;} // this don't echo "[$x] =&gt; ${arr[$x+1]}"; } print_r( $arr); </code></pre> <p>text.txt:</p> <blockquote> <p>0<br/> 1<br/> 2<br/> 3<br/> 4<br/> 5<br/> 6<br/></p> </blockquote> <p>output:</p> <blockquote> <p>[0] => 2[1] => 2<br/> [2] => 3<br/> [3] => 5[4] => 5<br/> [5] => 6[6] => 1Array<br/> (<br/> &nbsp;&nbsp;&nbsp;&nbsp;[0] => 0<br/> <br/> &nbsp;&nbsp;&nbsp;&nbsp;[3] => 3<br/> <br/> &nbsp;&nbsp;&nbsp;&nbsp;[6] => 6<br/> &nbsp;&nbsp;&nbsp;&nbsp;[7] => 1<br/> )</p> </blockquote> <p><strong>EDIT:</strong></p> <p>The example didn't really accomplish anything, it was useless just to show that something unexpected happened, so, here is something closer to what I need to do:</p> <pre><code>&lt;?php $arr = file('text.txt'); echo '&lt;pre&gt;'; foreach( $arr as $x =&gt; $line){ if( preg_match("/word$/", $line)){ $line = preg_replace( "/word$/", '', $line); $arr[$x+1] = 'word ' . $arr[$x+1]; } } print_r( $arr); </code></pre> <p>text.txt:</p> <blockquote> <p>test0<br/> test1word<br/> test2<br/></p> </blockquote> <p>expected values in the array:</p> <blockquote> <p>[0] => test0<br/> [1] => test1<br/> [2] => word test2<br/></p> </blockquote>
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    1. USAugusto Hack
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    1. COmodificating is a hell of a word.
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    2. COYou don't need to include [Bracketed Keywords] in your question title. That's what tags are for. I've updated the title and also fixed "modificating." :)
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