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1. Download the latest Thread Safe PHP binaries for Windows from https://www.apachelounge.com. The latest release of PHP 5.4 is 5.4.38 41 and is available at https://www.apachelounge.com/viewtopic.php?t=6359 (look for filename php-5.4.3841-Win32-VC9-x64.zip).
2. Unzip the package and rename the directory to php.
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