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PO
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17273879
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0
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0
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2013-06-24T11:01:26.710
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2013-06-24T11:19:55.820
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2013-06-24T11:19:55.820
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2170192
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2170192
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17273660
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2
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text
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I'll try to explain what happens briefly, so I'll use terms which may be not fully correct from the technical point of view. In your code, two inner functions <code>generateCharacter</code> and <code>generateNumber</code> are defined in the body of the outer function <code>generateString</code>. Initially, only the outer function (<code>generateString</code>) is "available" for the rest of your code. When the outer function gets called, it "defines" the two inner functions, and these become available in the global scope. I.e. the inner functions are not really private - they are exported into the global, not even class scope! When you call the outer function <code>generateString</code> more than once, the inner functions are getting "defined" more than once - as if you would define them more than once manually in the global scope. This is not allowed in PHP, since the error. <hr> Possible fixes: <ul> <li>Move inner functions into the global scope (they are exported there on the first call anyway). This it the worst way to go. </li> <li>Make <code>generateCharacter</code> and <code>generateNumber</code> simple private methods. </li> <li>Use PHP's <a href="http://php.net/uniqid" rel="nofollow"><code>uniqid</code></a> as suggested in the other answer. </li> </ul> <hr> Here a simplified scenario, to see what happens: <pre><code>class Test { public function aaa() { function bbb() { echo("bbb"); } echo "aaa"; bbb(); } } // bbb(); // would produce fatal error: undefined function bbb() $test = new Test(); $test->aaa(); // outputs "aaabbb" bbb(); // ok here, outputs "bbb" </code></pre>
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1. This table or related slice is empty.
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1. POGenerate a different random string in my for loop
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1. PTAnswer
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1. USAlex Shesterov
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1. USAlex Shesterov
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