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document that imagecolortransparent() returns -1 if there's no current transparent color, and a new one is not specified
git-svn-id: https://svn.php.net/repository/phpdoc/en/trunk@325917 c90b9560-bf6c-de11-be94-00142212c4b1
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@ -37,7 +37,9 @@
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&reftitle.returnvalues;
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<para>
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The identifier of the new (or current, if none is specified)
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transparent color is returned.
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transparent color is returned. If <parameter>color</parameter>
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is not specified, and the image has no transparent color, the
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returned identifier will be -1.
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</para>
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</refsect1>
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<refsect1 role="examples">
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