より適切に最適化するための PHP preg_replace の通常の置換コード。皆さん、ありがとうございました

d8135b5d0074e92cf16000424888dd7412334594b3e26ee717c64999d7867364b1b4a3
ff6d136ddc5fdfeffaf53ff6ee95f185
25edfb22a4f469ecb59f1190150159c6
f406333f50e01cab9bc66807dc646e08cc1b2caa96d152e9dd3b8330e0057adc37fe193b3306790c31844c9cd3d9663e
25edfb22a4f469ecb59f1190150159c6
f406333f50e01cab9bc66807dc646e0861c3399024144f22101bdd44de4297855db79b134e9f6b82c0b36e0489ee08ed
bed06894275b65c1ab86501b08a632eb
25edfb22a4f469ecb59f1190150159c6
f406333f50e01cab9bc66807dc646e08361c0dbd8d177fb2fab73f110970648d5db79b134e9f6b82c0b36e0489ee08ed
bed06894275b65c1ab86501b08a632eb
25edfb22a4f469ecb59f1190150159c6
f406333f50e01cab9bc66807dc646e08fc81f3cc6eb6df15c9ac5834ede456d95db79b134e9f6b82c0b36e0489ee08ed
bed06894275b65c1ab86501b08a632eb
929d1f5ca49e04fdcb27f9465b944689
';

$test2 = ' echo preg_replace($pattern, $test2, $text1);

我用了 $pattern = '/$pattern = '/<img src="\//i';

$pattern = '#<img src="/#i';

str_replace('src="/','src="http://www.qq.com/',$text1);

str_replace('src="/','src="http://www.qq.com/',$text1);

用文本替换效率肯定正没高吧？快10倍

str_replace('src="/','src="http://www.qq.com/',$text1);

用文本替换效率肯定正没高吧?