Auditing php source code with grep

XSS

grep -Ri "echo" *

grep -Ri "\$_" * | grep "echo"

grep -Ri "\$_GET" * | grep "echo"

grep -Ri "\$_POST" * | grep "echo"

grep -Ri "\$_REQUEST" * | grep "echo"

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SQL Injection

grep -Ri "$sql" *

grep -RI "mysqli(" *

grep -Ri "pdo(" *

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File inclusion

grep -Ri "file_include(" *

grep -Ri "file_get_contents(" *

grep -Ri "include(" *

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Command execution

grep -Ri "shell_exec(" *

grep -RIt "system(" *

grep -Ri "exec(" *