This is definitely not purslane. From the outside, the leaves of Portulaca oleracea should be thicker than yours, and they are yellow flowers, not white flowers.

Portulaca oleracea is a panicum miliaceum of Carnation and Portulaceae, and the whole plant is hairless. The stems lie horizontally, spreading on the ground, and the branches are light green or light red. Leaves alternate, flat, thick, horse-toothed, dark green on the top and light green or reddish on the bottom; The petiole is thick and short.

Flowers sessile, flowering at noon; Leafy bracts; Sepals green, helmet-shaped; Petals yellow, obovate; Stamens and anthers yellow; Ovary glabrous. Capsule ovoid; The seeds are small, oblique spherical, dark brown and shiny. The flowering period is from May to August, and the fruiting period is from June to September.

Nutritional value of purslane;

Portulaca oleracea is rich in nutrients such as dihydroxyethylamine, malic acid, glucose, calcium, phosphorus, iron, vitamin E, carotene, vitamin B and vitamin C. Portulaca oleracea has outstanding nutritional characteristics, and its ω-3 fatty acid content is higher than that of any plant. Omega-3 fatty acids can inhibit the absorption of bile acids, reduce blood cholesterol concentration and improve the elasticity of blood vessel wall, which is very beneficial to the prevention and treatment of cardiovascular diseases.

Refer to the above? Baidu encyclopedia-purslane