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<?php $val = '<input type="radio" name="alright" id="alright-1" value="1">'; echo preg_replace( '/<input([a-zA-Z_0-9 ="]*)type="radio"([a-zA-Z_0-9 ="]*)name="alright"([a-zA-Z_0-9 =\-"]*)value="1">/', '<input$1type="radio"$2name="alright"$3value="1" checked>', $val );
Output for git.master, git.master_jit, rfc.property-hooks
<input type="radio" name="alright" id="alright-1" value="1" checked>

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