Please see George Schlossnagle's response above.
... for want of a nail...
Essence of George's reply:
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the SuSE rpm may install it's header files in $foo/php5, but PHP
always expects them to be in $foo/php.
You can manually fix this by editing the executable 'php-config' (use
locate to find it, it's just a shell script) and change the line:
includedir="${prefix}/include/php"
to
includedir="${prefix}/include/php5"
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