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<?php echo strtolower(preg_replace('/([a-zA-Z])\s*[=]*\s*([a-zA-Z])/i', '$1_$2', 'algo = asslgo AND caca=8'));
Output for git.master, git.master_jit, rfc.property-hooks
a_lg_o = a_ss_lg_o a_nd_ca_ca=8

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